The 390 wasn't bad but............................................
390[edit]
The 390 cu in (6.4 L) AMC V8 produced 325 hp (330 PS; 242 kW) and 420 lb⋅ft (569 N⋅m; 58 kg⋅m) of
torque in all except the
Rebel Machine. This
muscle car engine was rated at 340 hp (345 PS; 254 kW) and 430 lb⋅ft (583 N⋅m; 59 kg⋅m) of
torque due to a different intake. Production only lasted one year (1970) before it was stroked to become the 401 cu in (6.6 L). Like the Gen-2, the maximum factory recommended overbore is only 0.02 in (0.51 mm), though they are commonly bored 0.03 in (0.76 mm).
401