Chrysler A engine
The Chrysler A engine is a small-block V8 gasoline engine built by Chrysler with polyspherical combustion chambers. It was produced from 1956 until 1967, when it was replaced by the wedge-head LA engine. It is not related to the hemispherical-head Hemi engine of the same era.
Chevrolet
The basic Chevrolet small-block V8 design has remained in continuous production since its debut in 1955, longer than any other mass-produced engine in the world, although current versions share few if any parts interchangeable with the original. Descendants of the basic small-block OHV V8 design platform in production today have been much modified with advances such as aluminium block and heads, electronic engine management, and sequential port fuel injection. Depending on the vehicle type, Chevrolet V8s are built in displacements from 4.3 to 9.4 litres with outputs ranging from to as installed at the factory. The engine design has also been used over the years in GM products built and sold under the Pontiac, Oldsmobile, Buick, Hummer, Opel (Germany), and Holden (Australia) nameplates.