"The 1970 Cutlass was available in seven body styles, three of which were coupes: a pillared fastback Sports Coupe , an hardtop fastback Holiday Coupe, and finally a more formal notchback Holiday Coupe, only offered in Cutlass Supreme trim. Counting all trim level and body style permutations, Oldsmobile's 1970 lineup included 15 different intermediate models. With GM tossing out the 400 cubic-inch limit for intermediates and the 4-4-2 now coming standard with the larger 455 cubic-inch Rocket V8 from the big Oldsmobiles and previously used in the 1968-69 Hurst/Olds, Olds discontinued the 400 engine entirely and also offered the 455 as an option in the Cutlass S models and the Vista Cruiser wagons. There was an SX option that became available in 1970 and was available only on the Cutlass Supreme hardtop and convertible. The SX cars all had the 455 engine and TH-400 automatic transmission."