Are you talking about FRPP M-6009-B392? If you are, the pistons are not ideal for boost and the compression is going to too high too. Check out www.dssracing.com they build some good shortblocks. I live 30 minutes from the shop and know they do a decent job. ~Brian
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1989 Black Mustang GT Hatchback, Underdrive Pulles, Electric Fan, Cold Air Intake, Headers, Offroad H-Pipe, Magnaflow catback, Steeda Tri-Ax, Fluidyne Aluminum Radiator, Timing at 14*, 3.73's
Coming not so soon: 408w
Ricer Hater's Club Member #59
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