481733 is for a 1971 engine. The intake is good with the 62 heads. The problem is with 72 and newer with 71 and older parts.
If it has the original pistons in the block, the cr would be a little lower from the extra space from the piston bevels.
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John Wallace - johnta1
Pontiac Power RULES !!!
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KRE's MR-1 - 1st 5 second Pontiac block ever!
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