The Volkswagen Caddy Mk1 came with a variety of small gasoline and diesel engines. However this Caddy built by Fly Garage in Poland is powered by an 4.2 L Audi V8 and manual transmission located in the bed making it a true mid-engine layout. Since the engine is the back the fuel tank was installed in the engine bay. The truck rides on a custom chassis and the rear brakes were upgraded to dual calipers.
Update 7/17/2017 – More details and photos of this project at Volxzone article.