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. For 1970, the
Cutlass Supreme nameplate was switched to Oldsmobile's equivalent of the downsized Pontiac Grand Prix on the A-body, to give the division an entry in the
burgeoning market for smaller personal luxury cars. As such, the two-door hardtop had a new notchback roofline, while lower trim-line Cutlass coupes had a
fastback style roof. The model remained in this role for virtually all of its production life. Unlike the Grand Prix and the also-related Chevrolet Monte
Carlo, which had wholly separate bodies and names from their less expensive siblings, the Supreme shared front and rear body parts with the standard Cutlass
line and was always marketed as part of it. In addition to the two-door hardtop (Holiday Coupe), the Cutlass Supreme series for 1970 also included a four-
door hardtop (Holiday Sedan) and regained the convertible bodystyle.
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