Quote:
Originally Posted by Classic v6 GMC's
Okay I dropped it off at the machine shop and he said we need .040 over pistons.
Can I get .040 over propane pistons? So I would have to run 91?
So if that cam, 1.84 and 1.6 valves, lump ports, 4 barrel and header will make a nice engine then I will do that. Just not sure on pistons.
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If it was me I'd go with a .040 over set of Ross pistons...but those will put you out $620. lol
Another issue is the sealed power pistons are only available in a .030 over bore.
If you can't find pistons you can shave the block and head for more compression. I shaved the head on my 292 .030. Block you'd have to be more conservative with. Any particular reason why you have to go .040 over???