PROFORM 66806 Pushrod Length Checker for Big Block Chevy with 7/16-Inch Rocker Studs

The PROFORM 66806 Pushrod Length Checker is a practical engine-building tool designed to help determine the correct pushrod length for Big Block Chevy applications using 7/16-inch rocker studs. Accurate pushrod geometry is essential for proper valve-train operation, and this checker makes it easier to evaluate rocker arm alignment, lifter position, and valve-tip contact before final component selection.
Built for engine assembly and performance valvetrain setup, the PROFORM pushrod checker allows users to adjust the checking length and verify the ideal measurement during mock-up. It is especially useful when changes to cylinder heads, deck height, head gaskets, rocker arms, camshaft specifications, or other valvetrain components affect the required pushrod length. Confirming the setup before ordering permanent pushrods can help reduce wear and support consistent engine performance.
The PROFORM 66806 is intended for Big Block Chevy engines equipped with 7/16-inch rocker studs and is supplied as an individual checker. Use it with the appropriate rocker arm and valvetrain components to establish a reliable reference for final pushrod selection. Its straightforward design makes it suitable for professional engine builders, performance technicians, and experienced enthusiasts completing custom or rebuilt Chevy Big Block engines.

Features:

• Application: Designed for Big Block Chevy engines with 7/16-inch rocker studs

• Function: Helps determine the correct pushrod length during valvetrain mock-up

• Adjustability: Supports checking rocker arm geometry and valve-tip contact before final assembly

• Use: Suitable for evaluating changes to cylinder heads, deck height, head gaskets, rocker arms, and camshafts

• Package: Supplied as one pushrod length checker

• Brand: PROFORM

• Part Number: 66806