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After looking at the specs on it, the cam is too small.
Lift: .447''/.454''
Duration: 256°/268°
RPM Range: 1000-5200
You have a good set of heads thay are gonna flow alot of air, and .30 overbore which actually makes the motor a 355, but the cam is just to small for the motor. You could also use a slightly bigger carb. As it is, Id say 325 horsepower, and 350ish torque, but that cam is really choking you up. With a better cam, and 650-750 cfm carb, I would put you in the 360-375 horsepower range with around 400 ftlbs of torque.
Rob
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