I have yet to make it to a dyno to see what my actual numbers are, and I don't even have track times with the new gears so there's another figure I can't quote you. But I will say this - Why not port the stock heads? I ported mine myself which was my first attempt at porting heads and I think they are flowing great and work well for my setup. I have around $300 in the heads counting the new valve springs and a 3 angle valve job. I know a set of aftermarket heads will do wonders over a stock head, but for an 18mpg street car that'll smoke LS1's all day long I can't complain.
Just a thought.
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Gunning for 12's!
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