The 440 4 barrel from 1966-1970 came in 2 forms
low hp spec. was rated at 350 hp@ 4400rpm, 480 ft-lbs@ 2800rpm
High performance (in muscle cars) 375 hp @ 4600rpm, 4800 ft-lbs@ 3200rpms
From 1971 with compression dropped hp and Tq dropped
1971- (9.0cr) 335 hp@ 4400rpm, 460 ft-lbs.@ 3200rpms
(9.7cr) 370 hp@ 4600rpms, 480 ft-lbs.@ 3200rpms
1972 - (8.2cr) 225hp @ 440rpms, 345ft-lbs.@ 3200rpms
Hp-perf.(8.2cr) 245hp@ 4400rpms, 360ft-lbs.@ 3200rpms
1973 - (8.2cr) 220hp @ 3600rpms, 350ft-lbs.@ 2400rpms
Hp-perf.(8.2cr) 275hp@ 4800rpms, 380ft-lbs.@ 3200rpms
1974 - (8.2cr) 230hp @ 3600rpms, 350ft-lbs.@ 3200rpms
Hp-perf.(8.2cr) 275hp @ 4400rpms, 375ft-lbs. @ 3200rpms
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