Oldsmobile used to make a 307 V8, but it has nothing in common with a Chevy V8.

NO. 403 is an Oldsmobile engine 400 is Pontiac engine

no it dows not i have a Pontiac 400. uses diff. parts not interchangeable.403 is Oldsmobile

If the engine is stock it is either a 3.8 V6, 5.0 V8, or a 5.7 V8 diesel

One of the first production automobile V8s was introduced in the United States in 1914 by Cadillac.

Oldsmobile, another division of General Motors, introduced its own V8 engine in 1916.

Chevrolet introduced a V8 engine in 1917

Ford introduced the V8 flathead engine in 1932. It was the first independently designed and built V8 engine produced by Ford for mass production.

Oldsmobile introduced the V8 overhead valve engine in 1949.

Oldsmobile introduced the "Rocket" overhead valve V8 engine.