I have a WWII military ambulance frame. It looks almost exactly like my 51 GMC as far as the parts go. It is a 4 x 4 and has a transfer case with it. Send me your E mail address and I'll send you some photos. It had a 48 carryall on it, so an AD series should fit. I have photos of the carryall on it, and could measure the frame for you. dlhenk 785-738-8714
