I plan on do a 355 buildup on my IROC, and was wondering what would be the best aluminum heads to use?

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89 IROC-Z with 350 TPI
1 3/4" SLP Headers, 3" mandrel bent pieps with high-flow cat and flowmaster, K&N air filters, Sony Xpold CD player, 17" chrome ZR1s

 

It depends on the flow you want. Ported, aluminum heads work good. If you want a little more, get the Twisted Wedge set. They will easily flow up to 400 horsepower. AFR makes three different sizes, but for more money. I have the AFR 195, but they're a liitle too big for my mods. I would've went with the Twisted Wedge ones if I knew then what I know now.

 

Aren't the Twisted Wedge ones the ones they used on Magnum TPI in GMHTP? Their power figures were only like 230 rwhp. I want to run 12s. I am goin to bore my engine .030 over with flat top pistons, comp cam (around 230 Duration), roller rockers,I would like to put a superram on it but that might flow to much.

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89 IROC-Z with 350 TPI
1 3/4" SLP Headers, 3" mandrel bent pieps with high-flow cat and flowmaster, K&N air filters, Sony Xpold CD player, 17" chrome ZR1s