Quote:
Originally Posted by 62GPSD
Tom
What would be the best late model heads for my 62 GP 421 if no 127 heads are used. What heads did you use. Thanks for all the info.
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If your shortblock is already built , you might need to consider cam lift and which type/size of valve reliefs your pistons have.
You could run big valve heads up to a certain point of valve lift with small valve reliefs in the 421 style pistons.
Tom is saying he used big valve heads 1971 #96 , with 96cc chambers (if stock).
If he did a full fresh build -- he probably used new pistons with proper larger valve relief size.