Answer
Chrysler built 3 versions of the 400 for the 76 cordoba. a 2 barrel model had 175 hp and 300 ft lbs torque. a 4 barrel model with lean burn was 210 hp & 305 torque. a 4 barrel model with factory dual exhaust had 240 hp & 325 torque. all had 8.2 compression ratio, 4.34 inch bore and 3.38 inch stroke. the 400 was introduced in 1972 as a replacement for the 383 which had been around since 1959, but it never was the performer the 383 was.