Quote:
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.
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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."
