Stock, 365 Horsepower @ 4600 RPM. However, this motor is the ultimate torque monster, 510 ft/lb @ 3000 RPM. If you have this motor, you are officially made of awesome! With mild mods it's easily a 400 horse motor. This is not true of 455 motors after 1969. 1968-9 motors are the strongest as they haven't been smogged down yet.
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