Just watched the video, he's a bit off though. That is a 1T based upon the 6 bolt wheels and rear axle. That makes it a WD20.
I wondered about that as it said he was a dually originally. Not too many people seeking the big axle.
Is your WD15 a 3/4 ton?
Where are you in Cali? There's a breakfast in Milpitas on Jan. 18th for the Bay Area Inliners, all makes and vehicles welcome. There's a guy with the beautiful '40 Plymouth, and another guy has a Mustang with a straight six in it. Chances are you're somewhere else, but I was curious.