For 1964, slight changes were made like renovations of the sheet metal and trim. Cars had a length of 209.9 inches and the station wagons 210.8 inches. The standard engine was the same but an additional two different 327 CID engines were available producing a horsepower of 250-300 and three 409 CID engines with horsepower ranging from 340 to 325. The Biscayne design and the Bel Air had little exterior differences like the chrome belt strip and price of$100 difference. The RHD Bel Airs were still imported to Australia and some featured the 1961  Pontiac instrument panel while others featured the more appealing North American panel. Some Bel Airs were equipped with Impala-style triple taillights and amber center lens to achieve Australian legal standards.

The Chevrolet full-sized cars were completely restyled and the length increased to 213.3 inches with the wheelbase unchanged. The new grille contained a lower extension below the bumper and was a bit veed. The new styling featured curved window glass and highly mounted taillights. The interior was also redesigned achieving an attractive dashboard. The standard V8 was the 283 CID model producing 195 horsepower and two new options were introduced the 396 cu in  CID engine with 325hp and two 409 CID blocks of 400hp and 425hp. To differentiate the Bel Air from the Biscayne series, it had a stainless steel belt and rocker molding, a signature to distinguish it at the rear fenders, glove compartment light, and a power tailgate on the nine-passenger station wagon.