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Are you trying to run this thing on pump gas? Even so, I wouldn't be afraid to run 8~10psi with a 6-71 at 8.5:1. You could get there with the Probe's that I mentioned above. The top ring is .320" down from the crown as I remember. So not a bad choice for a blower piston...

With a splash of race gas, you could run even more if you wanted to "turn it up".



Yes on the pump gas. This is going to be a street engine to replace my current LA/Magnum hybrid. A great working engine but I want the eye candy sticking out of the hood. Not to mention the extra thrills of close to 600 HP and TQ. Do you have a part number for that probe piston? I would like to check it out.

Jack