1968 GMC K35/K3500 Pickup Performance Engines

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Keep Your 1968 GMC K35/K3500 Pickup in Top Shape with Quality Performance Engines

Whether you’re repairing or upgrading your Performance Engine, using high-quality parts is key to keeping your 1968 GMC K35/K3500 Pickup looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Engine Intake Manifold Gaskets, Performance Engine Cylinder Head Gaskets, and Performance Intake Manifolds. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Performance Engines from Trusted Brands

Looking for a reliable Performance Engine? We’ve got you covered with options from brands you know and trust like Competition Cams, FEL-PRO Performance, and Spectre. For example, Competition Cams Performance Engines start at just $33.99 with an average 4.1 star rating. FEL-PRO Performance and Spectre offer similar pricing and quality, backed by strong customer feedback. With over 24 reviews and a solid 5 star average, you can shop with confidence knowing other GMC K35/K3500 Pickup owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1968 GMC K35/K3500 Pickup Performance Engine at Advance Auto Parts is around $238.56, with a range that starts at $8.99 and goes up to $1,008.00. With 100 options in stock from 8 trusted brands, finding the right fit is easy. Popular picks like Lower Intake Manifold Gasket Set: 9 Piece Set, High Performance Thermostat, and Water Neck start at just $27.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Performance Engine, don’t forget to check out other key components like Performance Air Filters and Performance Fuel Systems. At Advance Auto Parts, we’re here to help you keep your 1968 GMC K35/K3500 Pickup in peak condition, inside and out.

Looking for the perfect Performance Engine for your 1968 GMC K35/K3500 Pickup? You’re in the right place. Below, you’ll find links to various types of Performance Engines that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Performance Engines, ensuring durability and a precise fit for your GMC K35/K3500 Pickup. Whether you’re driving a 1968 model or another popular model year like 1969, 1970, 1971, 1972, 1973, and 1974, we’ve got you covered. Purchasing Performance Engines from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Performance Engines that fit your vehicle.

Essential 1968 GMC K35/K3500 Pickup Performance Engines

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$562.99

HoleShot 2400 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) Application: HoleShot 2400 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) A higher than stock stall speed as delivered by the Holeshot c

Product Features:

Furnace Brazed Impeller
Steel Alloy Pump Drive Tube
Heavy Duty Needle Bearing
Between Stator and Turbine
Furnace Brazed Turbine

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$35.49

Edge molded rubber water outlet gasket is reusable, great for engines that require regular disassembling for maintenance. Incorporates solid aluminum carrier for strength and rigidity. Can be used with OE replacement or aftermarket chrome water outlets. Requires no gasket sealer.

Product Features:

Edge Molded Rubber Water Outlet Gasket Is Reusable
Requires No Gasket Sealer
Solid Aluminum Carrier For Strength/rigidity
Reusable – Ideal for Engines That Are Frequently Taken Apart & Reassembled

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$77.99

Mr. Gasket screw-in rocker arm studs are manufactured from heat treated black oxide coated Grade 8 steel. Ideal for high performance street applications. OE style press in rocker studs can actually pull out of the cylinder head when using high lift camshafts. Includes sixteen studs 3/8-24 x 1.47 inch long top x 7/16-14 bottom.

Product Features:

Black Oxide Coated Grade 8 Steel
Kit Contains 16 Studs
Easy To Install
Heat Treated Steel
Grade 8 Steel

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$1201.99

Ideal for use with mainly stock components like rocker arms, intake manifolds, cylinder heads, compression ratio, torque converters and rear gear ratios, the High Energy camshaft grind family is a great choice for street performance applications.

Product Features:

Good blend of efficiency and performance.
Perfect choice for performance street rebuilds.
Work well with mainly stock components such as rockers, manifolds, heads, compression, torque converters and gears.

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$35.99

Mr. Gasket Performance Oil Pan Gaskets are manufactured from a high-density cork /rubber blend gasket material to provide excellent sealing and durability. Comes complete with molded rubber front/rear oil pan seals. For original equipment replacement and high performance street use.brbrFits Chevrolet 265,283,302,307,327,350,400 Gen I Small Block.

Product Features:

Manufactured from high-density cork /rubber blend gasket material
Provides excellent sealing and durability
Complete with molded rubber front/rear oil pan end seals where applicable
For OE replacement and high performance street use

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$259.99

HYDRAULIC – Xtreme Energy: Street/strip, 2800+ stall, rough idle. 9.5:1+ compression.

Product Features:

HYDRAULIC – Xtreme Energy: Street/strip, 2800+ stall, rough idle. 9.5:1+ compression.
284/296 Advertised Duration, 240/246 Duration @ .050″, .574″/.578″ Lift, 110 Lobe Separation
Valve spring upgrade required
Best performance with aftermarket intake manifolds, headers, lower gear ratios etc.

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$53.99

Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:

PROPRIETARY COATING – Nonstick anti-friction coating seals small surface imperfections
NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
SUPERIOR SEAL – Precise embossed Printo seal sealing beads at all vital areas to eliminate leak paths
STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces

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$457.99

Edelbrock #8827 Water Pump small block Chevy cartridge style race ideal to prevent overheating in street rods and street machines, as well as in tow rigs and motorhomes. Using state-of-the-art racing technology, Edelbrock has designed these “super cooling

Product Features:

Standard Impeller Rotation
0.750 in. Pilot Shaft
0.750 in. Ball/Ball Bearing
5.8125 in. Block To Hub Height
Satin Finish

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$199.99

Product Features:

Case-Hardened Tubing
Welded Ends
5/16 in. Diameter
Use with or without Hardened Steel Guideplates

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$75.99

These grade 8 alloy steel, longer length bolts are designed to compensate for thread length lost when using head bolt washers. This allows increased torque and clamping. Set of 16 does one cylinder head.

Product Features:

Cylinder Head Bolts
Longer-Than-Stock
High Quality Grade 8 Alloy
Increase Torque Settings
Higher Clamp Loads On Gasket

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$32.49

Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:

Opens At 195 Degrees
Designed to Resist Large Variations of Coolant Pressure at High RPM
Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
For High Performance Street, Drag Race, and Oval Track
Copper & Brass Construction – Resists Corrosion
High Flow

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$27.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
SEALING TECHNOLOGIES — Exclusive sealing innovations and technologies with proprietary materials and unique design features to ensure a superior seal for your repair
ENGINEERING EXPERTISE — Parts are designed, reviewed, validated and approved by Fel-Pro engineers through rigorous research and development
REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted

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$266.99

Product Features:

Non-Rotator
1.500 in. Outside Diameter
1.082 in. Inside Diameter
1.340 in. Coil Blind
Set of 16

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$135.99

Product Features:

Use W/ Valve Springs Part #5762, 5795
Use W/ Locks Part #9612
1.50 in. Outside Diameter
Steel Material
Black Oxide Finish

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$28.49

This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It also provides for an upgrade for that leaky rope style seal and is a direct replacement for a rubber main seal. It’s also injection molded for a precise fit.

Product Features:

Repairs That Leaky Rear Main Sail
Silicone Rubber to Withstand Extreme Engine Oil Temperatures
Upgrade for Rope Seal Equipped Cars or Direct Replacement for Rubber Main Seal
Injection Molded for Precise Fit

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$35.99

If you are changing your camshaft or replacing the timing set, make sure to replace this seal at the same time! Made from Nitrile rubber.

Product Features:

Nitrile Rubber And High Density Cork
Will Not Shrink Or Stick

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$43.99

Spectre’s Chevrolet water neck fits Chevy V8 engines and features a 90 degree neck with a 360 degree swivel design for a custom look and fit. This water neck has been designed around the OEM specifications, has a height of 2-7/8 inches and has a polished aluminum finish for a lasting look that fits great. This water neck includes the allen bolts and sealing O-ring.

Product Features:

Fits Chevy V8 engines
90 degree neck with a 360 degree swivel design
2-7/8 inch height
Includes sealing O-ring and allen bolts
Polished aluminum finish
Easy to install

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$223.99

COMP Cams offers a complete line of valve stem seals, from the umbrella seals to the positive-stop Teflon seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The umbrella seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop Teflon seal is used. The umbrella seals require no machining, but with the Teflon seal it is necessary to disassemble the heads and machine the top of the guide with a special .530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don’t forget the valve seals.

Product Features:

Work with .530″ guides and 11/32″ valve stem diameter
Valve stem oil seals keep unwanted oil from entering the combustion chamber
Several different types of valve seals are offered

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$13.99

High Energy Hydraulic Flat Lifter Chevrolet SBC, BBC, and 194-292/200-262 V6.

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$552.99

Edelbrock part #75013 RPM Air-Gap RPM intake manifold is designed for 1955-86 262-400 c.i.d. Chevrolet V8’s. The award-winning RPM Air-Gap intake manifold incorporates the same race-winning technology that’s used on our Victor Series competition intakes.

Product Features:

1500-6500 RPM Range
Dual Plane Type-4150 Style Flange
4.2 in. Front Height, 4.72 in. Center Height, 5.25 in. Rear Height
Black Powder Coated Finish
Non-EGR

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$409.99

New Everbright(TM) Manifold coating now available on the most popular Weiand and Holley intakes uses proprietary vacuum metalizing technology combined with a protective clear powdercoat to provide long lasting, virtually maintenance free polished looks.

Product Features:

Low Rise/Dual Plane Design For Maximum Torque
Permanent Mold Casting Process
Lighter/Smoother/Better Looking/Consistent Casting
Dyno Proven To Make 25hp Over Competition
Fully CNC Machined For A Perfect Fit
Square Bore Carburetor Flange
Exhaust Crossover For Improved Street Drivability

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$83.99

COMP Cams Hi-Tech Roller Race Timing Sets include cast iron camshafts gears, induction hardened billet steel crank sprockets, and pre-stretched, heat-treated double roller chains with heavy-duty large pin design. They feature 3 keyway crank sprockets for

Product Features:

Cast iron camshaft gear and induction hardened billet steel crank sprocket
Pre-stretched, heat-treated true double roller chain with heavy-duty large pin design; chain available separately
Ideal for all street performance and race applications
Features 3 keyway crank sprocket for 4-degree incremental adjustability, 4-degree maximum advance/retard
Dynamically balanced and quality checked for run-out tolerances

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$49.99

With Mr. Gasket cam degree bushings you fine tune the camshaft timing of your engine to as little as 1 degree. Even aftermarket timing sets with multiple keyways can’t give the range of adjustment these bushings allow. Retard your camshaft to lower the powerband for more low end torque and midrange horsepower, or advance for more top end power. This kit does even number adjustment 0-8 degrees.

Product Features:

Advance the cam for increased torque and horsepower
Tune your powerband for more end torque or increase top end horsepower
Includes (4) offset bushings and (1) 0 degree bushing
Cam sprocket dowel pin hole must be drilled to .406¿ (13/32¿) dia.
Cam sprocket dowel pin hole must be drilled to .406┐ (13/32┐) dia.
Increase Top-End Horsepower

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$51.99

Mr. Gasket Performance Valve Cover Gaskets are high-density cork/rubber blend gaskets that use evenly sized cork particles distributed evenly throughout the rubber binder. The result is a compressible valve cover gasket without leak paths. These gaskets create a positive seal by controlled swelling of the gasket material when exposed to hot engine oil. Provides excellent flange sealing and durability. For original equipment replacement, high performance street, drag race and oval track use.brbrThese gaskets are .312 inch thick. That’s substantially thicker than stock which can allow for additional valve train clearance.brbrFits Chevrolet 396,402,427,454,502 Gen IV, Gen V and Gen VI Big Block.

Product Features:

This Gasket Has A Cork Rubber Blend
Provides Excellent Sealing And Durability
Extra Thick For The Hard To Seal Applications

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$22.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Blue Stripe performance cork-rubber gaskets use cork particles evenly distributed throughout a rubber binder resulting in a compressible gasket without leak paths.
Not intended for use in emission controlled vehicles.

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$19.49

Precision timing tape can be used on a factory balancer to create HP through accurate timing, and makes setting valve lash simple.

Product Features:

8″ diameter
1970-73, 396-427-454 cu. in.
1967-69, 302 cu. in.
1965-68, 327 cu. in. hi-performance
1970-76, 400 cu. in.
1970-73, 350 cu. in.

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$20.99

Precision timing tape can be used on a factory balancer to create HP through accurate timing, and makes setting valve lash simple.

Product Features:

7″ diameter
1965-71, 396-427 cu. in. big block
1970, 400 cu. in. small block
Set Valve Lash At Proper Time

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$32.49

Secure the harmonic balancer or dampener on your Chevy. Works on original equipment, high performance street, drag or circle track applications. Features a heat treated black oxide coated Grade 8 alloy steel bolt for strength with a tall hex head to prevent wrench from slipping. An extra thick parallel ground washer provides accurate, uniform torque, and a lock washer is also included.

Product Features:

Heat treated black oxide coated Grade 8 alloy steel
Tall hex head bolt to prevent wrench from slipping
Extra thick parallel ground washer provides accurate, uniform torque
Washers Provides More Accurate And Uniform Torque
Grade 8 Alloy Steel

Popular 1968 GMC K35/K3500 Pickup Performance Engines Categories

Performance Engine Coolant Thermostats

Performance Intake Manifolds

Performance Water Outlet Gaskets

Performance Engine Water Pumps

Performance Water Outlets

Performance Engine Cylinder Head Gaskets

Performance Engine Camshaft and Lifter Kits

Performance Engine Harmonic Balancers

Performance Engine Intake Manifold Gaskets

Performance Engine Timing Sets and Components

Performance Engine Valve Springs

Performance Engine Valve Cover Gasket Sets

Performance Engine Rocker Arms

Performance Engine Camshafts

Performance Engine Oil Pan Gaskets

Performance Engine Valve Lifters

Performance Engine Main Bearing Gasket Sets

Performance Engine Cylinder Head Bolts

Performance Engine Push Rod Guideplates

Performance Engine Timing Cover Gasket Sets

Performance Engine Push Rods

Performance Engine Valve Spring Retainer

Performance Torque Converters

Performance Engine Valve Stem Seal Sets

Most Popular Performance Engine Intake Manifold Gaskets for 1968 GMC K35/K3500 Pickups

Enhance your 1968 GMC K35/K3500 Pickup with one of the 5 Performance Engine Intake Manifold Gaskets we have in stock, starting at just $27.99.

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$27.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
SEALING TECHNOLOGIES — Exclusive sealing innovations and technologies with proprietary materials and unique design features to ensure a superior seal for your repair
ENGINEERING EXPERTISE — Parts are designed, reviewed, validated and approved by Fel-Pro engineers through rigorous research and development
REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted

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$32.49

Mr. Gasket Performance Intake Gaskets are manufactured from cellulose/nitrile composition gasket material. They provide excellent sealing and durability. Can be trimmed if necessary for modified port applications. For original equipment replacement, high performance street, drag race and oval track.

Product Features:

Made From Cellulose/nitrile Composition Material
Provides Excellent Sealing And Durability
Can Be Trimmed If Necessary For Modified Port App

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$34.99

Product Features:

Clean Positive Seal
Embossed Silicone Bead Surrounding The Port
Matched To Manifolds And Cylinder Heads

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$57.99

Ultra-Seal intake manifold gaskets are manufactured from cellulose/nitrile composition gasket material. Provides excellent sealing and durability. Incorporates Silicone beading around each intake and water outlet port to provide additional sealing strength on both sides of each gasket. No gasket sealer required. For OE replacement, high performance street, drag race and oval track use. Includes manifold end seals and distributor gasket.

Product Features:

Manufactured from cellulose/nitrile composition gasket material
Provides excellent sealing and durability
Silicone beading on both sides of each gasket
Complete with manifold end seals and distributor gasket
For OE replacement, high performance street, drag race and oval track use
Creates Tight Leak proof Seal

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$28.99

Product Features:

Clean Positive Seal
Embossed Silicone Bead Surrounding The Port
Matched To Manifolds And Cylinder Heads

Best-Selling 1968 GMC K35/K3500 Pickup Performance Engine Cylinder Head Gaskets

Upgrade your K35/K3500 Pickup with one of our 3 best-selling Performance Engine Cylinder Head Gaskets, earning an average 5 stars rating across 1 reviews.

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$64.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

PROPRIETARY COATING – Nonstick anti-friction coating seals small surface imperfections
NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
SUPERIOR SEAL – Precise embossed Printoseal sealing beads at all vital areas to eliminate leak paths
STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces

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$53.99

PROPRIETARY COATING – Nonstick anti-friction coating seals small surface imperfections
NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
SUPERIOR SEAL – Precise embossed Printo seal sealing beads at all vital areas to eliminate leak paths
STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces

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$139.99

Product Features:

Head: 4.370″ Bore/0.039″ Thick/9.70cc Vol.
Intake: 1.82″x2.54″ Port/.060″ Thick
Exhaust: 1.940″ Round Port
5/16″ Valve Cover
Multi Piece Configuration

Top-Quality Performance Intake Manifolds for 1968 GMC K35/K3500 Pickups

Choose a high-quality OEM or aftermarket Performance Intake Manifold for GMC K35/K3500 Pickups and enjoy top-notch performance from $427.99.

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$492.99

Based on performer RPM-series with unique air gap. Air gap cooler and denser mixture for more power. Designed for 1500 to 6500 RPM street-driven power. Dual-plane high-rise intake with 180 degree firing order. Produces incredible top-end horsepower. Retains good throttle response and acceleration. Larger plenum and runners maximize other upgrades. Edelbrock total power package maximizes gains. Available in cast, polished or endurashine finish.

Product Features:

Based on Performer RPM-Series with Unique Air Gap
Air Gap Cooler and Denser Mixture for More Power
Designed for 1500 to 6500 RPM Street-Driven Power
Dual-Plane High-Rise Intake w/180 deg Firing Order
Produces Incredible Top-End Horsepower
Retains Good Throttle Response and Acceleration
Larger Plenum and Runners Maximizes Other Upgrades
Edelbrock Total Power Package Maximizes Gains

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$838.99

For 3500 to 7500 PRM. Use where low-end torque is not a prime factor. Great for engines with slightly modified heads. HEI ignition will not clear manifold. Street machines, street rods, pro-street and marine.

Product Features:

For 3500 to 7500 RPM
Use Where Low-End Torque is Not a Prime Factor
Great For Engines w/Slightly Modified Heads
Top Has Vacuum Outlet for Power Brakes
Will Accept Forward and Sideways Mounted Carbs
Carburetor Center-to-Center Dimensions 9.38 in
HEI Ignition Will Not Clear Manifold
Street Machines; Street Rods; Pro-Street; Marine

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$435.99

Product Features:

High Rise/Dual Plane Design For Maximum Torque
Fully CNC Machined For A Perfect Fit
Square Bore Carburetor Flange
Exhaust Crossover For Improved Street Drivability
Permanent Mold Casting Process
Lighter/Smoother/Better Looking
More Consistent Castings

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$427.99

Holley products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors power every NASCAR Sprint Cup team and every NHRA Pro-Stock champion. Holley’s products include performance fuel pumps, fuel injection, intake manifolds, cylinder heads & engine dress-up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies, Hooker Headers, Flowtech Headers, NOS, Weiand, or Earl’s, Holley products can give you the edge you need over the competition.

Product Features:

Single Plane/Open Plenum Design
Deep Plenum Design With Isolated Runners
4150 Square Bore Carburetor Mounting Flange
Power Band 4500-8500 rpm
Height Front 4.77 in. Rear 6.16 in.
Port Size 2.30 in. Height 1.60 in. Width
50 State Legal

Top Picks for 1968 GMC K35/K3500 Pickup Performance Engine Valve Cover Gasket Sets

Invest in one of our 6 durable Performance Engine Valve Cover Gasket Sets for your 1968 GMC, knowing you’re getting trusted brands and expert craftsmanship.

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$51.99

These are high quality gaskets that works well on those hard to seal applications. The low density fiber & rubber blend gasket material seals those minor head imperfections with a low clamp force. At .312 inch, the extra thickness can also offer slightly more clearance for roller rockers. Ideal for all those high performance applications where you take the valve covers off and on a lot, and sticking is a problem.brbrFits all 1965-2000 Chevy Big Blocks: 366,396,402,427,454 including GM (General Motors) Gen VI Crate Engines like the 502 and 572.

Product Features:

These Are A Cork Rubber Blend
Extra Thick 5/16 In Creates Positive Seal
Also Available In Standard Thickness
For OE Replacement And High Performance Apps

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$33.99

Spectre’s Valve Cover Gasket is designed using extra thick rubber and a steel reinforced core. Engineered for optimum fit and function, this valve cover gasket provides superior sealing and stops leaks.

Product Features:

Extra thick rubber
Steel core reinforced
Superior sealing
Stops leaks

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$42.99

These are high quality gaskets that works well on those hard to seal applications. The low density fiber & rubber blend gasket material seals those minor head imperfections with a low clamp force. At .187 inch, the extra thickness can also offer slightly more clearance for roller rockers. Ideal for all those high performance applications where you take the valve covers off and on a lot, and sticking is a problem.brbrFits all 1965-2000 Chevy Big Blocks: 366,396,402,427,454 including GM (General Motors) Gen VI Crate Engines like the 502 and 572.

Product Features:

Manufactured from high-density cork/rubber blend gasket material
A black latex rubber coating is applied to the outside of gasket to help seal minor flange irregularities and eliminate the possibility of oil leakage
Creates a positive seal by controlled swelling of the gasket material when exposed to hot engine oil.
For OE replacement, high performance street, drag race and oval track use.
.187″ thick for additonal valve train clearance
Handles Ex Flange Pressure
Forms Leak Proof Seal
Black Latex Coating

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$51.99

This Gasket Has A Cork Rubber Blend
Provides Excellent Sealing And Durability
Extra Thick For The Hard To Seal Applications

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$25.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Die cut silicone rubber gaskets conform to out-of-flat covers
Great for on-again/off-again situations
Not intended for use in emission controlled vehicles.

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$24.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Blue Stripe performance cork-rubber gaskets use cork particles evenly distributed throughout a rubber binder resulting in a compressible gasket without leak paths.
Not intended for use in emission controlled vehicles.

Top-Rated Performance Water Outlet Gaskets for 1968 GMC K35/K3500 Pickups

Make a smart move for your 1968 GMC K35/K3500 Pickup with products all priced from $9.99 to $35.49.

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$9.99

This is a high quality gasket that will seal that leaking water neck, and provide you with years of service. This gasket works well in all applications.

Product Features:

Made From Cellulose/Nitrile Composition
Provides Excellent Sealing And Durability
These Gaskets Are Die Cut For a Precision Fit
Fits Small Block Chevy V8 Engines 1955-’90
Fits Big Block Chevy V8 Engines 1965-’90
Fits Small Block Chrysler 318/360 1979-’92
Fits Small Block Chrysler 3.9L/5.2L/5.9L Magnum 1992-’03

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$35.49

Edge Molded Rubber Water Outlet Gasket Is Reusable
Requires No Gasket Sealer
Solid Aluminum Carrier For Strength/rigidity
Reusable – Ideal for Engines That Are Frequently Taken Apart & Reassembled

Top-Rated Performance Engine Brands For Your 1968 GMC K35/K3500 Pickup

When it comes to finding the perfect Performance Engine for your 1968 GMC K35/K3500 Pickup, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 8 trusted brands. We carry the most popular Performance Engine brands including FEL-PRO Performance, Spectre, and Competition Cams, and more, all known for their exceptional customer ratings (average brand rating of 4.2 stars) and competitive prices, as low as $12.99. Purchasing a Performance Engine from us here at Advance Auto Parts is a smart move for both you and your 1968 GMC K35/K3500 Pickup, providing peace of mind with parts that meet or exceed OEM standards.

Popular FEL-PRO Performance 1968 GMC K35/K3500 Pickup Performance Engines

If you’re looking for a top-quality Performance Engine for your 1968 GMC K35/K3500 Pickup, Advance Auto Parts has exactly what you need with our selection of FEL-PRO Performance Performance Engines. We have 2 FEL-PRO Performance Performance Engines in stock for this fitment, all known for their durability and precision fit. With prices starting at just $43.99 and an average cost of $54.49, you’ll find the perfect Performance Engine for your needs and budget. FEL-PRO Performance Performance Engines for the 1968 GMC K35/K3500 Pickup come highly rated, with over 2 customer reviews and an impressive average rating of 4.2 stars. Choosing a FEL-PRO Performance Performance Engine from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

from $43.99

(1)

Engine Crankshaft Seal Kit

“no better on the market”

from $64.99

(1)

Cylinder Head Gasket: Steel Core Composite, Without Head Bolts

“Have not had a chance to install, but have used FelPro in the past with good results.”

Top-Quality Spectre 1968 GMC K35/K3500 Pickup Performance Engines

For those in search of a high-quality Performance Engine for their 1968 GMC K35/K3500 Pickup, Advance Auto Parts offers a great selection of Spectre Performance Engines. With 2 Spectre Performance Engines in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Performance Engines start at just $12.99, with an average price of $23.49, giving you a range of options to suit your budget. Backed by over 2 customer ratings and an average rating of 4.2 stars, Spectre Performance Engines provide both reliability and excellent performance. Choosing a Spectre Performance Engine from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.

from $33.99

(1)

Valve Cover Gasket Steel/Rubber Bbc

“I really like the rubber/steel design of the gasket.”

from $12.99

(1)

Water Neck Chev Late w/Hdr

“nice bolts”

FAQs for 1968 GMC K35/K3500 Pickup Performance Engines

What are the best-selling Performance Engines for 1968 GMC K35/K3500 Pickups?

Out of 100 Performance Engines that fit 1968 GMC K35/K3500 Pickups, the following parts are the top sellers:

Lower Intake Manifold Gasket Set: 9 Piece Set (19781770) – $27.99
High Performance Thermostat (22903641) – $32.49
Water Neck (22901052) – $32.49

What’s the price range for 1968 GMC K35/K3500 Pickup Performance Engines?

The prices of Performance Engines for the 1968 GMC K35/K3500 Pickup range from $8.99 up to $1,008.00 for the most premium parts.

What is the average price of a Performance Engine for a 1968 GMC K35/K3500 Pickup?

The average price for Performance Engines for the 1968 GMC K35/K3500 Pickup is $238.56. Keep in mind the variety of part types within our Performance Engine category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Performance Engines for other GMC K35/K3500 Pickup model years?

Yes, we carry Performance Engines for 5 model years of GMC K35/K3500 Pickups between 1969 and 1974. The following model years are the most popular for Performance Engine purchases: 1974, 1973, 1972, 1971, 1970, and 1969.

What are the cheapest Performance Engines for my 1968 GMC K35/K3500 Pickup?

The cheapest 1968 GMC K35/K3500 Pickup Performance Engines we carry are:

High Energy 8.684" Long, 3/8" Diameter Pushrod (50289273) – $8.99
Water Outlet Gasket (6120954) – $9.99
Engine Valve Spring (50286657) – $9.99
10 Degree Steel Retainer for 26120 Beehive Spring (50289146) – $10.99
Water Neck Chev Late w/Hdr (22905349) – $12.99

Does Advance Auto Parts sell Performance Engines for any other 1968 GMC models?

Yes. We stock Performance Engines for 13 other popular 1968 GMC models. Some of the most popular are 1968 C15/C1500 Pickup Performance Engines, 1968 C15/C1500 Suburban Performance Engines, 1968 K15/K1500 Pickup Performance Engines, 1968 K25/K2500 Pickup Performance Engines, and 1968 K15/K1500 Suburban Performance Engines.

What are the top-rated Performance Engines that fit the 1968 GMC K35/K3500 Pickup?

The one 1968 GMC K35/K3500 Pickup Performance Engine we have in stock is the High Energy 8.684" Long, 3/8" Diameter Pushrod. It costs $8.99.

What types of Performance Engines do you sell for my 1968 GMC K35/K3500 Pickup?

As of 3/1/26, these are some of the most in-demand types of Performance Engines for a 1968 GMC K35/K3500 Pickup:

Can I get help with 1968 GMC K35/K3500 Pickup Performance Engine orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Performance Engines and more.

What is your return policy for GMC K35/K3500 Pickup Performance Engines?

Advance Auto Parts keeps returns simple. For new GMC K35/K3500 Pickup Performance Engines and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

1968 GMC K35/K3500 Pickup Performance Engines

B & M – Holeshot 2400 (Part No.20412)

Mr. Gasket – Premium Quality Thermostat Gasket with Solid Aluminum Carrier (Part No.738G)

Mr. Gasket – Ultra Seal: Screw-In Rocker Arm Studs (Part No.1076)

Competition Cams – High Energy 206/206 Hydraulic Flat Cam K-Kit (Part No.K12-205-2)

Mr. Gasket – Oil Pan Gasket (Part No.196)

Competition Cams – Xtreme Energy 240/246 Hydraulic Flat Cam (Part No.11-250-3)

FEL-PRO Performance – Stainless steel core laminate Engine Cylinder Head Gasket (Part No.1047)

Edelbrock – Water Pump Cartridge for Small-Block Chevy (Race Style) (Part No.8827)

Edelbrock – Pushrod Set for S/B Chevy (Part No.9630)

Mr. Gasket – Ultra Seal: Cylinder Head Bolts (Part No.941G)

Mr. Gasket – High Performance Thermostat (Part No.4365)

FEL-PRO Performance – Lower Intake Manifold Gasket Set: 9 Piece Set (Part No.1212)

Edelbrock – Complete Sure Seat Valve Spring Kit for Chevy 396-402-427-454 V8 (Part No.5895)

Edelbrock – Performer Series Retainer (Qty 16) (Part No.9731)

Mr. Gasket – Rear Main Seal Gasket (Part No.1960)

Mr. Gasket – Timing Cover Seal (Part No.17)

Spectre – Aluminum Water Neck Chev (Part No.4933)

Competition Cams – VALVE SEALS, 11/32" TEFLON 1 ST (Part No.503-16)

Competition Cams – High Energy Hydraulic Flat Lifter Chevrolet SBC, BBC, and 194-292/200-262 V6. (Part No.812-1)

Edelbrock – Performer RPM AIR-Gap Small Block Chevy Black Intake Manifold (Part No.75013)

Weiand – Action +Plus; Intake Manifold (Part No.8120P)

Competition Cams – TIMING SET, HIGH TECH SMALL BLOCK CHEVY 1 EA (Part No.3100)

Mr. Gasket – Advance And Retard Cam Bushings (Part No.85)

Mr. Gasket – Valve Cover Gasket Set (Part No.182)

FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1640)

Mr. Gasket – Precision Timing Tape (Part No.1591)

Mr. Gasket – Precision Timing Tape (Part No.1589)

Mr. Gasket – Ultra Seal: Harmonic Balancer Bolt/Washer Kit (Part No.7845)

FEL-PRO Performance – Lower Intake Manifold Gasket Set: 9 Piece Set (Part No.1212)

Mr. Gasket – Intake Gasket (Part No.121)

Edelbrock – Intake Manifold Gasket for 1965-1990, Oval port 396-402-454 B/B Chevy (Part No.7203)

Mr. Gasket – Ultra Seal: Intake Gasket (Part No.5818)

Edelbrock – Intake Manifold Gasket for 1991 & Later Rectangular port 454 B/B Chevy (Part No.7202)

FEL-PRO Performance – Cylinder Head Gasket: Steel Core Composite, Without Head Bolts (Part No.1037)

FEL-PRO Performance – Stainless steel core laminate Engine Cylinder Head Gasket (Part No.1047)

Edelbrock – Engine Gasket Set (Head / Intake / Exhaust / Valve Cover) for Chevrolet (Part No.7362)

Edelbrock – RPM Air-Gap Big Block Chevy 2-R Intake Manifold (Part No.7562)

Edelbrock – Street Tunnel Ram Big Block Chevy 2-O Intake Manifold (Part No.7115)

Weiand – Stealth; Intake Manifold (Part No.8018)

Holley – Intake Manifold (Part No.300-5)

Mr. Gasket – Ultra Seal: Valve Cover Gasket Set (Part No.5863)

Spectre – Valve Cover Gasket Steel/Rubber Bbc (Part No.586)

Mr. Gasket – Ultra Seal: Valve Cover Gasket Set (Part No.5862)

Mr. Gasket – Valve Cover Gasket Set (Part No.182)

FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1605)

FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1606)

Mr. Gasket – Water Outlet Gasket (Part No.740C)

Mr. Gasket – Premium Quality Thermostat Gasket with Solid Aluminum Carrier (Part No.738G)