The first Chevrolet to pace the Indy 500 was a 1948 convertible. The Fleetmaster had a model-year run from 1946, 1947 and 1948 and included the Fleetline sub-series which was offered only in two-door and four-door fastback body styles. According to an entry in Wikipedia, the Fleetmaster replaced the “prewar” Chevrolet Special Deluxe and was powered by a 216.5 cubic inch (3.5-liter) straight-six engine driving through a three-speed manual transmission. It was offered in two-door...