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 small-block engine
The L46 became an optional engine for the 1969 Chevrolet Corvette. It was a higher performance version of the base V8 with casting number 186 valve heads and had an 11.0:1 compression ratio requiring high octane gas and produced (SAE GROSS POWER). It was also available in 1970 with 4bbl Quadrajet carburetor and L46 hydraulic cam, dome piston (+), 186 heads, and a four-bolt block.