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Comments about Proform Carburetor Main Body for Holley 750 Cfm, Vacuum Secondary Carb:
It took less than 30 minutes to change out the main body in my holley 750. I'm using the carb on a fairly built 396 that's good for a 12.85 quarter mile in a 65 vette. The difference was impressive. No noticeable degradation down low, very noticeable improvement on the top end. I haven't taken the car back to the strip, but I'd say that the Proform main body is a very cost effective way to pick up horsepower, assuming that your engine could benefit from more air-fuel. It's a whole lot cheaper than a Holley HP.
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Q:the motor is running rich , stock jets my question is the jets on main body the one's in main body close to air vent, the front primary 1 is small,1 is bigger .my question 2 can I ex-change out with each other big /little?
A:Hi Dmj! Without the presence of your vehicle we would not be able to properly diagnose it, nor provide you with a 100% answer. However, I would suggest that you take your vehicle and get it thoroughly checked by a certified mechanic before buying any parts that may/may not solve the problem.
Q:Do you have this part for mechanical secondaries
A:Sorry, Keith. This ProForm Carburetor Main Body for Holley 750 Cfm, (Part No. 67101C) is not available for mechanical secondaries.
Q:does the holley 750 proform work with vacuum disk brakes? And Edelbrock intake?
A:I'm happy to help, Fred! This ProForm Carburetor Main Body for Holley 750 Cfm, Vacuum Secondary Carb (Part No. 67101C) is engineered to fit a Holley 4160 series 750 CFM carburetor (Part No. 3310). Typically the vacuum for your brake booster is connected to the intake manifold, so the main body replacement should not affect your booster. Installation instructions for the main body are available here: https://www.proformparts.com/common/instructions/67100C_67101C_Install.jpg.
Q:is this proform 67101c body made of aluminum?
A:Yes, the main body material of this ProForm Carburetor Main Body for Holley 750 Cfm, Vacuum Secondary Carb -part# 67101C is made of aluminum. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.