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My 401 AMC Spirit GT with a Richmond 5-speed and a 2.87 gear was built for street and some road racing. It has been dynoed twice, in 2000 at 302 hp.and 390 ft.lb. at the rear wheels and at the 2003 Bristol Bash with a fresh engine,a better high torque cam and the new Air-Gap intake it showed 323 hp. and 410 ft.lb. at the rear wheels. This means at the engine SAE net = 372 hp. and 471 ft lb.
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