9.250" Chromoly Heat-Treated 3/8" 0.080" Wall DNA® One-Piece Pushrods Although the GM heads are

Although the GM heads are good pieces

The Speedmaster 9" solid pinion bearing spacer kit is designed to retain the pinion depth settings for greater strength and reliability

This Speedmaster Throttle Body is designed to produce smooth

Speedmaster crankshaft damper spacers are just what you need to install your  429 or 460 damper

9.250" Chromoly Heat-Treated 3/8" 0.080" Wall DNA® One-Piece Pushrods Although the GM heads areGet all of the performance that your engine can produce with these durable pushrods designed especially for high lift cams. Speedmaster pushrods are available in both 5 16 in. and 3 8 in. diameters. They feature . 080 in. wall thickness and are formed from 4130 chromoly steel. These one piece Speedmaster pushrods are heat treated for use with guideplates. They have a minimum wall thickness of . 080 in. to handle higher rpm, plus a black oxide finish.