It cost me twice the amount of $$$ to rebuild a set of Pontiac cylinder heads as it did my 383 small block Chevy engine. And the heads were done 12 years ago. Spent $2800 rebuilding the 389 in my '65 GTO in 1981 and it's still in there running (blueprinted) and I spent $1800 in 1988 on the stock rebuild of my '67 GTO engine. I would think doing a Pontiac today the right way would run parallel to what b-man posted. A lot depends on how good the block and crank are, etc. And heads....don't forget them. new valves, seats, guides, etc. can add up.
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Jeff 
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