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1970 Oldsmobile 442 W-30 Convertible Is Old-School Muscle Car Royalty 11 Feb 2021, 9:27 UTC · by Established 11 years before William Crapo Durant and his associates founded General Motors, Oldsmobile peaked in 1970 thanks to the 442 mid-size muscle car with the 455 CID engine. The W-30 Convertible in the photo gallery is one of 96 units produced that year, and it’s a bit of a hoot off the line thanks to 500 pound-feet (678 Nm) of torque. 35 photos The big-block motor with 365 horsepower on deck from 7.5 liters of displacement is based on the tall-deck 425. It is complemented by the W-25 fiberglass hood with functional hood scoops, a low-restriction air cleaner on top of the four-barrel carburetor, an aluminum intake manifold with the Winters Foundry snowflake logo, and the high-lift camshaft for improved responsiveness. The cast-iron motor with an overhead valvetrain is paired with a heavy-duty manual transmission, a close-ratio four-speeder with a Hu ....