Re: motor size
I say sell your stuff and buy aftermarket parts. If the block is good and heads have good dates you could sell you stuff and buy a aftermarket motor.
Anyway here is one of my brothers Zl1 specs for you. 052 block 470CI. 13.5 VENOILA pistons plasma rings, Carillo H beam rods, GM 074 heads, 650 Crowler roller cam. It has a Dart intake and dominator carb. Bore 4.470 Stroke 3.75 Champion plugs c59x 36 degree timing. etc. It made 634 hp.@6100rpm and 652 torque @ 4200 rpm. I believe there is still some left in that with more tunning. Good luck hope this helps.. Compression is a little high for street although your gotta be runnung 108 in your car know.
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