Correct valvetrain geometry is critical to ensure trouble-free operation of an engine, especially during high-rpm operation. When building a new engine, many people simply reuse the original pushrods ...

The most common reasons for using a pushrod that is longer or shorter than stock are: a decked cylinder block or heads, thicker/thinner head gaskets, small base-circle camshafts, aftermarket rocker ...

If you are into precision engine building, you've no doubt heard the standard line for establishing the proper pushrod length: With proper pushrod length, the rocker tip should be in the center of the ...