A new, trimmer El Camino was unveiled in 1978, adopting the new, more sharp-edged Malibu styling, and a one-inch longer wheelbase of 117 in (2,972 mm). The 1978 through 1987 El Caminos were produced in four trim levels: Classic, Black Knight (1978)/Royal Knight (1979–83), Conquista and Super Sport, and shared chassis components with the Chevrolet Malibu. Chevrolet 90° V6 and Buick V6 engines were used for the first time. The optional 305 cubic-inch small block V8 was rated at 150 or 165 hp (112 or 123 kW), and from 1982–1984, the Oldsmobile-sourced diesel engine was also optional. The El Camino ended production in 1987.