Check with Vintage Power Wagons.
Vintage Power Wagons-- Your Source for Dodge Power Wagon Parts and Trucks! -- civilian military m 37, m-37 wc Dodge Power Wagon
They usually have a few restorable trucks sitting around. I hope you're not tall. I'm 6'2" and the cab is cramped. You'll have to replace the whole drive train if you want a hot rod. PW gearing is something like 5.8:1 so they only go about 45 mph at 3000 rpm.
Why not go for a Swivel Frame Power Wagon? They look like fun, "Hold on, I gotta lock the hubs and unlock the frame."
1953 Dodge Swivel Frame PW