LT1 Nova

[SSDiv6]

Originally Posted by Alan Roehrich

The Edelbrock Olds head uses regular studs and guide plates. However, it would not be a problem at all for Edelbrock to make a run with 5/16-18 threaded rocker bosses to accept factory valvetrain. They did not alter the valve location or angle on the Edelbrock head.

You do not need to run the factory rocker bosses anymore, the rules are already changed to allow guide plates and studs.

Refer to:

Stock Cars

Section 9A

Engine: 1

Page 136 (05/08)

Camshaft/Lifters: Delete last sentences of paragraph and replace with "Larger diameter pushrods permitted. Pushrod guide plates permitted. Cylinder head may be clearenced for larger diameter pushrods."