The best answer I can give you is an ICE or Internal Combustion Engine. As for size you must be way more specific. Corvettes graced the streets with almost everything from a straight 6 cylinder in 1953 up to and including a big block 454 in 1972.
350 is common though.
V8 super charged 638 hp engine
it is a big engine bay, some people have put LS1 corvette engines in them
The 2013 Chevrolet Corvette has a V8 engine.
The base engine is the 350ci L48 V8 that puts out 180hp and the optional engine is the 350ci L82 V8 that puts out 210hp.
there is no such engine for 1978 you either have L48 or L82.
The 2005 Chevrolet Corvette has a V8 engine.
The 2008 Chevrolet Corvette has a V8 engine.
The 2010 Chevrolet Corvette has a V8 engine.
The 2007 Chevrolet Corvette has a V8 engine.
The 2012 Chevrolet Corvette has a V8 engine.
The 2002 Chevrolet Corvette has a V8 engine.
The 2003 Chevrolet Corvette has a V8 engine.