I was woundering how much horsepower these heads would make on a high compression 600ci motor naturally aspirated unported out of the box heads as well as ported? I have always ran sbf so the big blocks are new to me. Thanks in advance for any input.
I am from arkansas. The rules are for conventional headed big blocks,638ci limit,cast single four barrel carbs on racing gas,29x10.5 tire.3200lbs race weight,no DFI,aluminum blocks add 200lbs,small blocks can run any style heads and at 2800lbs. You are right about duffy,but he is a good fellow. I have also checked with the rule makers and these heads are legal.
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