In 1954 the first Star Chief model was launched out of the Chieftain, and using a Chevrolet A-body but extended by 11-inches to give 123.5-inch wheelbase, against 120-inches for the Chieftain. It was powered by a 4,079cc (249) straight-8 engine and offered as a Deluxe or better equipped Custom. Bodies available were a 4-door sedan, 2-door convertible or the pillarless Catalina 2-door hardtop. For 1955 a new chassis, body and engine was given to the Chieftain and Star Chief ranges.