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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).
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.
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.
1968 – 1972 Oldsmobile 442; 1968 – 1972 Oldsmobile Cutlass; 1968 – 1972 Oldsmobile Cutlass Supreme; 1968 – 1972 Oldsmobile Vista Cruiser; 1968 – 1972 Pontiac GTO; 1968 – 1970 Pontiac Tempest; 1968 – 1972 Pontiac LeMans; 1970 – 1972 Chevrolet Monte Carlo; 1971 – 1972 GMC Sprint; The successor to the A II platform. 1973 Buick ...
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 Eldorado and Corvette. [2] From 1973 to 1975, the only Oldsmobile convertible offered was the full-sized Delta 88 Royale.
The 455 CID engine was replaced by the smaller 403 CID V8, and the Oldsmobile 350 V8 was now the standard engine. The Ninety-Eight set a new sales record of 139,423. A four-door sedan and a two-door hardtop coupe were available. 1979 Oldsmobile 98 Sedan 1981 Ninety-Eight Regency sedan 1984 Ninety-Eight Regency coupe
Hurst produced aftermarket replacement manual transmission shifters and other automobile performance enhancing parts.. Hurst was also an original equipment manufacturer (OEM) for automakers and provided services or components for numerous muscle car models by American Motors (AMC), Ford, Chrysler, and General Motors.
The GM B platform was introduced in 1926 with the Buick Master Six, and the Oldsmobile Model 30, and had at least 12 major re-engineering and restyling efforts, for the 1937, 1939, 1941, 1949, 1954, 1957, 1959, 1961, 1965, 1971, 1977, and 1991 model years; along with interim styling changes for 1942, 1969, and 1980 that included new sheetmetal and revised rooflines.
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