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Brand new mine made 453hp 410 torque through a 4000 stall turbo 400 and moser 9". 10.25 on motor in a 1991 foxbody. Very mild cleanup on the heads.
what is the rest of your setup? those are stout numbers for sure. my motor was new as well (500 miles) but it was through a heavy *** clutch and gto irs