Only 113 W30 convertibles and 659 W30 coupes were produced in 1972. A special edition Hurst/Olds paced the Indianapolis 500 in 1972. The H/O coupe was based on the notchback Cutlass Supreme Holiday coupe (not offered with the 4-4-2 option) and the Cutlass Supreme convertible, both of which came standard with a 270-net horsepower 455 Rocket four-barrel V8 or optional 300-net horsepower W-30 option 455. Both H/O engines were mated to Turbo 400 transmissions with console-mounted Hurst Dual Gate shifters. A H/O Vista Cruiser was provided for the Medical Director. Appearance changes included a silver grille with black surround, black headlight bezels, round parking lights in front bumper, and 3-section horizontal tail lights. Third generation 1973 Originally expected to debut for the 1972 model year, the new "Colonnade" body style was delayed until 1973 due to an auto workers strike in 1972. The body was redesigned to feature massive long doors and energy absorbing bumpers. The rear windows were fixed and the roof was reinforced in anticipation of roll-over standards being imposed by the government. These cars were a few hundred pounds heavier and slightly larger than the 1972's. Consistent with 1972, the 4-4-2 option remained a handling and appearance package, code W-29, and was available on the Cutlass and Cutlass "S". It consisted of a faux louvered hood, FE2 suspension, specific grilles, emblems and stripes. Items such as dual exhaust and super stock wheels were optional, reflecting an industry-wide weaning of U.S. consumers from large powerful cars. The W-30 (that had in 1972) had become a trim package. The L77 "V" code 455 was there, but only with the 4-speed wide-ratio M-20 transmission. 1973 was also the last year of the 4-speed manual transmission in the Oldmobile "A" body. The L77 "V" code produced 270 net HP, the L75 "U" code 455 AT produced , while the "K" code 350 single exhaust produced and the "M" code 350 with dual exhausts produced . Positraction rear ends, axle ratios, gauges, Super Stock wheels, HD cooling and many sport type options were optional. The L77 "V" code engine was also available in the Hurst/Olds without A/C, code W-46, the W-45 L75 "U" code was standard with A/C. Both 455s used the Turbo Hydra-matic 400 transmission, while the 350 was mated to the Turbo 350. Interior trims for the '73 4-4-2 included a cloth/vinyl or all-vinyl bench seat and rubber mats on