Repro Pontiac round port/Oldsmobile W30 cyl heads

[agtw31]

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So,if I buy a pair of new repop casting for $2,500 rather then a original pair for about $10k(that might I have a defect)that would make my car any less real?

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it is still a documented 70 w-30,which is still rare,no matter what heads are on any motor.
what people seem to forget is 455's were toast after being beat on back then,and most original motors were chucked after puking their bearings,or crank.
so not having the original motor is somewhat of a big deal,having the docs to prove it's heritage makes a difference,too.