I would have to say the easiest engine to work on I've ever seen is the 3800 in the 1992 Oldsmobile Ninety Eight Regency Elite I almost bought. The engine bay is pretty much the same size as the engine bay in my deVille. But with the Ninety Eight, it looks like "too little engine, too much space" where as with the deVille it looks like "too much engine, too little space".
Its funny what difference 1.1L and 2 cylinders makes....