The Cutlass and other GM intermediates were completely restyled for 1968 with wheelbases shortened to 112 inches for 2-door coupe models and lengthened one inch to 116 in 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 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.
1972 was also the final year for Olds to offer the Cutlass Supreme convertible, until 1990. In its final year, it was the best-selling convertible in the U.S., with 11,571 sold, or 16% of the market, beating the Fleetwood Eldorado and Corvette.