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The base 455 was rated at 340 hp (254 kW), with the W-30 achieving a rating of 350 hp (261 kW). The W-27 option was downgraded to an aluminum cover for the cast iron differential housing. 1971 Oldsmobile 442 W30 in Antique Jade Green. The 1971 4-4-2 was available in a hardtop coupe and convertible body type.
Also available was the L77 V code 455 with 270 horsepower (200 kW) available only without air conditioning. Although Pontiac's SD 455 cubic-inch engine lasted one more year with 290 horsepower (220 kW), Oldsmobile's high performance 455 engine would only last one more year culminating with the L76 optioned 455 W-30 Hurst/Olds in 1974.
1968 and 1969 400s shared the Olds big-block standard 4.25 in (107.95 mm) stroke with the 455 but used a undersquare 3.87 in (98.30 mm) bore to comply with GM's maximum 400 cu. in. displacement restrictions in the A-body cars while also reducing tooling costs. Displacement is similar to the earlier engine, at 399.9 cu in (6,554 cc).
The '74 Stage 1 455 was only available with the Turbo 400 automatic and detuned to 245 hp (183 kW). This engine was also offered on other Buicks in 1974 including the Riviera, LeSabre and Electra. 1973-1975 Oldsmobile Cutlass Hurst/Olds W-30 — These were built using 455 cid V8 engines in the W-30 trim.
All Cutlass models came standard with front disc brakes [16] The standard engine was a 180-horsepower (134 kW) 350 Rocket V8 (K VIN engine code), a 200-horsepower (149 kW) 350 Rocket V8 with dual exhaust (M code), a 250-horsepower (186 kW) 455 Rocket V8 (U code, or L75), and a 270-horsepower (201 kW) 455 V8, with a hotter cam and W30-style ...
The Oldsmobile Cutlass Supreme is a mid-size car produced by Oldsmobile between 1966 and 1997. It was positioned as a premium offering at the top of the Cutlass range. It began as a trim package, developed its own roofline, and rose during the mid-1970s to become not only the most popular Oldsmobile but the highest selling model in its class.
1971 – 1976 Buick Estate; 1971 – 1976 Oldsmobile Custom Cruiser; 1971 – 1976 Pontiac Safari; 1971 – 1976 Pontiac Grand Safari; 1971 – 1972 Chevrolet Townsman; 1971 – 1972 Chevrolet Kingswood; 1971 – 1972 Chevrolet Brookwood; 1977 – 1984 Cadillac Fleetwood Brougham; All references to 1971–76 GM station wagons should be B1, not C1.
Also called the GM small corporate pattern and the S10 pattern. This pattern has a distinctive odd-sided hexagonal shape. Rear wheel drive applications have the starter mounted on the right side of the block (when viewed from the flywheel) and on the opposite side of the block compared to front wheel drive installations.