The car used in this film was a 1966 Pontiac Bonneville Convertible, of which about 11,000 were produced. The standard model came with a 389 cubic inch (6.4 liter) engine with 2-barrel carburetor that produced about 325 horsepower. It was also available with an optional 421 cubic inch (6.9 L) engine with 4-barrel carb or GM's "Tri-Power" carb. Turbo-Hydramatic 3 speed transmission was standard, manual optional. The front seat in the movie car was a standard split-back bench seat, but bucket front seats were also available. The dark copper-red exterior of movie car was not an authentic color offered by Pontiac-General Motors in 1966. Original available colors included Black, White, Milano Maroon, Nocturne Blue, Martinique Bronze (aka Martinique Gold), and a creamy shade of Yellow. The interior of the movie car appears original (judging by the door panels) and is white/ivory. Other available interior colors included Black, Nocturne Blue, and Martinique Bronze. The rear-view mirror had been removed from all of the movie cars, probably to prevent the chrome mirror housing from casting a reflection of the film crew. The opaque black steering wheel appeared to be an aftermarket replacement, as the originals were transparent acrylic, tinted to match the interior color, overlaid on a chrome circular rod.
Rose Ranger was commissioned to write and performed the song "Soul Sisters" for Bonneville's premiere screening at The Toronto International Film Festival.