The 1965 Impala was offered as standard ... included the Turbo-Fire 327 with two power outputs – 250 and 300 horsepower. These two engines could be ordered for any full-size Chevrolet model ...

The 327 engines could be had in either 250 hp or ... Such was the dominance of the Impala in 1965, around half of the total cars Chevrolet manufactured were its full-size offering.