Tech Tip - PUSHROD LENGTH AND ROCKER ARM GEOMETRY
 

A large number of variables are involved in determining the correct length pushrod for your application. Any or all of the following affect pushrod length:

 Block Deck Height
 Head Deck Height
 Head Stud Boss Height
 Rocker Arm Brand/Design
 Cam Base Circle Size
 Lifter Design/Brand/Pushrod Seat Height
 Valve Stem Length

Do not assume anything in determining the right pushrod for your new engine. A pushrod that fits one engine may not necessarily work in another. Any number of items can be different on your engine, requiring you to use a different pushrod length. Following the steps below will streamline the pushrod selection process, ensuring that you get the right parts the first time.

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