The terms shortblock and longblock does not have anything to do with the engine type, it is a term commonly used when talking about exchange engines, in any type of car. A shortblock is the engine with internals, but without the cylinder head, a longblock is the engine with cylinder head, but still without the accessories like manifolds, alternator etc.

When talking about aircooleds, a shortblock is the engine case with the crankshaft and camshaft installed, but without the cylinders and heads. A longblock is a complete engine case with internals, cylinders and heads.

An engine ready for installation is also commonly called a turnkey engine.

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If you have a 5 cylinder, you don't need a stereo.

1999 Audi A6 quattro
1990 Volkswagen Golf CL Syncro
1987 Audi Coupe quattro