How do you market America’s best-selling car? With firm, quiet confidence, as shown in this spot for the 1968 Impala Sport Coupe, Chevy’s style-setting fastback two-door.

In the late 1960s, the Chevrolet division of General Motors reigned over the domestic auto industry. In 1968 alone, Chevy produced more than two million automobiles, leading the sales charts by a country mile and nearly outselling all the other GM car divisions combined. Of these two million-plus sales, more than 700,000 were scored by the Impala, the brand’s wildly successful entry in the full-size class. The Impala then virtually defined the family-car category, which was the major slice of the new car market in those days. Without resorting to exaggeration, Chevrolet pitched the Impala as “America’s favorite car,” driving home the message by adding, “Be smart. Be sure. Buy Chevrolet.”

This original 1968 Chevrolet spot concentrates on the Sport Coupe, the Impala’s stylish two-door fastback model. (The ’68 line also included four-door sedans and hardtops, a convertible, a wagon, and a formal-roof Custom Coupe.) Under the direction of division boss Pete Estes and director of engineering Alex Mair, Chevy offered a seemingly endless list of engine and powertrain options for the Impala, from the modest 250 CID stovebolt six to the mighty 427 CID big-block V8, and an equally exhaustive selection of paint, trim, appearance, and convenience choices. Chevrolet in the 1960s was an automotive cornucopia—the proverbial horn of plenty. Video below.