I don't know the wheel base.. I'm pretty ignorant to the whole truck. I bought it 2 years ago for 400 bucks (its most of the cab and the front sheet metal plus the frame and a 56 chevy motor). Then I moved 11 hours away from the truck because of work. I'd like to start doing some small projects and parts collecting for it and get some guys I know to fix up the cab for me. It is a duel rear wheel axle, was that an option for both? I'll have to get my guys to measure it for me. Thanks for the info.