Produced from 1968–1980, the Rocket 350 was entirely different from the other GM divisions' 350s. It used a 4.057 in (103.0 mm) bore and Oldsmobile small-block standard 3.385 in (86.0 mm) stroke for 350 cu in (5.7 L). Output ranged from 160-325 hp (119-242 kW). 1968-1974 350s were painted gold; 1975-1976 350s were metallic blue like the 455; 1977-1980 models were painted GM Corporate Blue. The "Rocket" name disappeared from the air cleaner decal in 1975, the same year that the catalytic converter was added to the emissions control system.

The Oldsmobile 350s made from 1968-1976 have heavy castings, beefier crankshafts, and better flowing heads.[[i]citation needed] The 1977-1980 350s have lighter castings, including a thinner block with large "windows" in the main bearing bulkheads,[[i]citation needed] and have crack-prone cylinder head castings[[i]citation needed] manufactured by Pontiac Motor Division (castings are marked "PMD"; these heads were also used on the 260),[[i]citation needed] and a lightened crankshaft.[[i]citation needed] Some later versions[[i]which?] of this 350 were produced with an analog electronic port fuel injection system, introduced in the Cadillac Seville of 1976.[[i]citation needed]

Applications:

• 1976-1979 Cadillac Seville
• 1979 Cadillac Eldorado
• 1968-1977 Oldsmobile Cutlass
• 1968–1977 Oldsmobile Vista Cruiser
• 1973-1977 Oldsmobile 4-4-2
• 1968-1980 Oldsmobile Delta 88
• 1977-1980 Oldsmobile 98
• 1979-1981 Oldsmobile Toronado
• 1973-1979 Oldsmobile Omega