Thanks for all of the encouragement, guys. MikeE....the "plumbing"on the right side was/is a spare tire carrier. There are two fold down seats behind the front seats, and two long fold down benches inside. The rear bumper is a flip up wooden step, the Previous Owner said he was told that it was used as a Mobile Recruiting Office in Maine, at the beginning of WWII. I'm not sure I understand your question about the platform on top of the cab, I don't see anything.
Shorty's plan is to get it Rollin, Brakin' and Runnin'....kinda in that order. He has been able to remove and save all of the hinges so far, and has gotten off the wheels, after Much pounding on the rears. It had dual heaters in the engine compartment, one running hot air through a large flexible tube to the back into a diffuser. Any one want to suggest where to go for tires ? ? :D