1960 Chevrolet Impala Convertible While the new air-cooled rear-engine Corvair compact stole most of the thunder, Chevrolet had an extraordinary calendar year otherwise with the company selling 1,873,598 units, of which 1,391,485 were 1960 models. The full-size 1960 cars were a streamlined version of the rather rounded 1959 design, with simpler grille and squared up sides. The curved fins were now flattened into a “seagull” spread-wing shape and a missile treatment was featured along the rear qu