Chevrolet small-block engine
In 1992, GM created a new-generation small-block engine called the "LT1 350", not to be confused with the high-output Generation I LT-1 of the 1970s. It displaced , and was a 2-valve pushrod design. The LT1 used a reverse-flow cooling system which cooled the cylinder heads first, maintaining lower combustion chamber temperatures and allowing the engine to run at a higher compression than its immediate predecessors.
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.