The base Ambassador DPL model was canceled, with three body styles now available in SST and Brougham trim. Fleet purchasers could order plain Ambassadors in Police Pursuit Vehicle (PPV) or Special Service Package (SSP) versions. A six-cylinder engine was no longer available; thus, Ambassador became exclusively V8-engined car for the first time since 1964. This made the Ambassador the only volume-produced American car that included air conditioning, power brakes, automatic transmission as well as a V8 engine as standard equipment; all while being priced less than the Big Three's full-sized cars. The base engine was the with two or a versions optional. The engines were designed to operate on regular grade, low-lead, or unleaded gasolines. All were based on the engine designs responsible for AMC winning the 1971–1972 Trans-Am Series. The BorgWarner transmission was replaced by the "Torque-Command" (TorqueFlite) three-speed automatic sourced from Chrysler.