Quote:
Originally Posted by Adger Smith
OEM part numbers, but I don't think the DRCE 4.90 or 5.0 bore space heads are legal for SS/AM. You have to stay away from certain Pro Stock heads because of the bore space. It has to have stock bore space, like 4.840 for BB Chevies.
There is, or was, a fast SS/AM car that has been eleminated because of the bore space rule. Be careful!!!
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Adger is correct, the bore spacing must remain OEM. In SS/AM you are allowed to run a Splayed head valve configuration.