You don't see these for sale very often: http://cgi.ebay.com/ebaymotors/Othe...Not_Street_Legal_&hash=item43bd3a336d&vxp=mtr If I didn't have a garage full of projects I'd be all over it.
The way I read it, he formed the body himself. It looks like a good start if it can be made legal to run.
Take another look. the one with the trailer in it. In the back is another racer I believe. It has red wheels.
Yup, he built it, had a build thread right here on the HAMB http://www.jalopyjournal.com/forum/showthread.php?t=431553
More on the "8N" tractor in the background http://www.jalopyjournal.com/forum/showthread.php?t=567560 I don't know this guy, but he builds some awesome stuff, and takes time to document it here. I have followed a couple of the builds and subscribed to them for reference.
That bellytanker is still for sale. I talked to the owner/builder. Turns out that the buyer backed out on the sale.