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There's really not a difference in power? I figured the few cubic inches would have a small effect on power. The reason I was asking about the dished or FT pistons was because I have a large combustion chamber, around 76cc I think. I can't find 305 heads or I would go with them. Right now I have supposedly the worst casting GM heads around. I've got a Lunati .515"/.515" cam and I was going to run 93 octane gas.
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