15% OFF ORDERS $35+ | 20% OFF $100+ | ONLINE ONLY
USE CODE
HOLIDAYSAVE
*
Exclusions apply.
Advance Auto Parts Logo
Choose a Store
  • Shop All
  • Replacement Parts
  • Performance Parts
  • Accessories
  • Oil & Fluids
  • Special Offers
  • Speed Perks
  • Advice & How-Tos
  • Project Guides
  • FAQ / Help Desk
Loading...
Share
Product thumb
Product main large
Loading...
How Would You Like To Get This Item?

Store Pickup

Loading...Loading...Loading...

Same Day Home Delivery

Loading...Loading...Loading...

Home Delivery

Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...

Product Information

Product Details
Part No. 66789
Warranty Details (90 DAY REPLACEMENT IF DEFECTIVE)
Proper push rod length is absolutely critical for peak performance - minimizing bent or broken valve stems, guide wear, and energy-wasting valve side-loading friction. Fits all 1955-1986 Chevrolet Models.

Product Features:
  • Engine Push Rod Length Checking Tool
  • Blue Finish
  • Made from High-Quality Molded Plastic
  • Mock-Up Rocker Arm Style
  • For Small Block Chevy Engines with 3/8 Inch Studs
  • Helps Determine Proper Pushrod Length
  • Fits 3/8 Inch Studs
  • 100% New Components; Not Re-man or Refurbished
  • Easy Installation
  • Prevents Valve Train Wear
  • Sold Individually
  • PROFORM Parts Brand Product
Loading...
Loading...Loading...Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...
No results
Loading...
Loading...Loading...Loading...Loading...Loading...
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
Brake Pads & Shoes
Brake Rotors
Alternators
Water Pumps
Starters
Brake Calipers

Order Lookup

Help Desk

Store Locator

In Store Services

Mobile App

CUSTOMER SUPPORT
Accessibility Statement
Contact Us
Forgot Password
Help Desk
In Store Pickup
In Store Services
Order Tracking
Recall Information
Return Policy
Same Day Delivery
© 2025 Advance Auto Parts
Privacy Policy
Terms of Use
Site Map
ADVANCING A WORLD IN MOTION®