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What comp. is your motor? Are the heads stock? I would think that if you have E85 readily available to you that you could reach those numbers on E85 and be on a lot cheaper fuel. Granted that your fuel system has enough flow capable of running E85
9.5:1 compression, cobra crank, cp pistons, cant remember the rods, arp hardware stock heads and cams for now. Im thinking im going to be in the 550-575 range