Darryl Starbird's custom van, Vantasta, is #10. Built all in metal, it was based on a 1974 Ford van, but powered by a 500hp Chevrolet 350ci. engine. It was completely driveable, so not a show car per se.
The clue to this one came from a YouTube video, which makes me think video sites may be an untapped resource for other puzzles.