What I did was to actually cheat alittle bit. I bought a '63 wagoneer frame that was already set up for the AD body. The waggy has the correct wheel base and the closest axle width I could find. I think a good many of the older waggoneers are very close to the '63 but with stouter drivelines. I just lucked out on the set up, I simply bolted my sheet metal on. Alot of short box chevys from the '70 and '80's are close to the correct wheel base but the axles are too wide, especially up front. There are ways around that, but it may be what you are looking for. If you are looking for a lifted type truck a solid axle truck with the body rotted off is a good place to start. If you want to modify the stock frame some Wagoneer or Cherokee axles may be close to the same width as stock. Just head to the junck yard with a tape measure. Good Luck