Oldsmobile Built the 1970 442 W-30 as a Four-Speed Convertible — Only 96 Buyers Ever Got One by Jack Harmon Oldsmobile built the 1970 442 W-30 convertible with a four-speed manual for buyers who still wanted to shift their own gears. Auction records show only 96 of them exist — here’s the 455 Rocket V8 package that made this rare build worth chasing.
