Quote:
Originally Posted by formula kid
I am talking about Factory D port heads. Yes HO and SD
Do flow better but you will pay $2,500 and up for a set.
70 64 are the only high compression heads Pontiac made.
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In this case the OP was looking for the best 'bang for the buck', the highly sought after (by 1970 GTO restorers) #64 doesn't qualify, very expensive with prices in the $500 to $1000 range for good cores. For a fraction of the cost there are much better head choices out there with nearly the same chamber size.
The #64 is nothing special from a performance standpoint, there are quite a few D-port heads with nicer ports from the factory than this one.