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Can I use Gen III heads and intake with Gen II pistons? I'm sure you can, but I want to make absolutly sure. Will there be any problems? Thanks!
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yes you can. I have gen II pistons in my 3100.1999 Olds Alero 2.4 to 3500 swap (running). totaled by a honda
1992 lumina 4 door 3500 3spd auto 15.020 @93.5 mph
1984 Cavalier type 10 hatch 3100 5spd!!!
14.96@91.47 in the 1/4
9.63@74.36 in the 1/8th
14.30 on slicks! scrapped due to rust! -
Yes, I have aftermarket stock replacement 3.1 (genII) pistons in my genI block that has genIII heads, and have done so for over a year now.
This does drop your static compression ratio though, if you were to use the stock aluminium head gaskets with the genII pistons, then you will end up with a SCR of about 8.9:1, but if you use the genII pistons with an iron head head gasket you can raise the SCR back up to about 9.3:1, which I will be doing next, when I swap to the larger port top end. BTW you can't (safely) use the iron head gaskets with the genIII pistons.Comment
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