Kiwi Belly Tank: Great video. The "no bumping" rule reminds me of my brother and I, as pre-teens, chasing each other on our minibikes around and around and around the house. Similar endings to our races, too! We'd race until either something or someone broke.
The GMC looks like it was called the project TVS-4 (‘Travel Vehicle Streamlined, model 4’). For maximum grunt, it dropped in a mighty 455ci V8—an engine that also powered the ’68 Toronado. It looks like it was the 23' model, but I'm not sure. In 2007, it looks like it went 106mph. (Google info, so it may not be accurate
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Tremulis' 26' Travoy was powered by the identical engine, so the similar results is not surprising. Here's a quick build-up:
Yada, yada, yada... Then here's a couple full-size prototypes:
Yada, yada, yada... The next thing you know, you're in a brochure illustrated by famed futurist Syd Mead: