The Rocket 350, built from 1968 to 1980, was totally distinct from the 350s made by other GM divisions. Its 350 cu in. engine had an extremely oversquare 4.057 in (103.0 mm) bore and 3.385 in (86.0 mm) stroke. 160 to 325 horsepower were produced. How do I identify an Oldsmobile 350 rocket engine? The large number that follows the casting number identifies the specific small-block engine. A “2” denotes a 350 ci engine, while…