You guys are to blame, I'm sure of it. It was the weirdest thing.
Back half was built from an old '40s or '50s school bus. The real swoopy kind of body? Interior had been redone in some very nice wood paneling. The driver's position inside was completely gone, as was the hood, engine, and all the front end. Basically a pair of frame rails coming out.
In between the frame rails was an equally old tractor body where the driver would sit, exposed to the elements. However it appeared to have been split down the middle of the hood and widened as underhood was an absolutely massive flathead V8. If you could picture a flathead V8 that powered a tank, that's the size we're talking about. In front of the tractor was an equally massive Potvin supercharger.
The whole thing was a nice pale blue, like the early Richard Petty cars.