The Cutlass and other GM intermediates were completely restyled for 1968 with wheelbases shortened to 112 inches (2,845 mm) for 2-door coupe models and lengthened one inch to 116 in (2,946 mm) for four-door sedans and station wagons (with the exception of the glass-roof Vista Cruiser wagon, which rode on an even longer 121-inch (3,100 mm) wheelbase). The Cutlass Supreme, now the top-line Olds intermediate series was pared down to two- and four-door hardtop models with the pillared sedans and coupes dropped and the convertible moved to the lower-priced Cutlass "S" line, upon which the 4-4-2 muscle car was now based. Also the standard Rocket V8 was enlarged from 330 to 350 cubic inches with 310 hp (231 kW).