YES! I think your NUTS! I have a couple of pix of a Ford one-ton I saw at a show with a Cummins 4cyl from some sort of delivery van truck. Was small, yet looked good in truck. Might be able to find one of those around cheap, rarely see those old delivery vans sell very high. As to the ones in Jap trucks, they usually run high. One brand that would be cheap for whole truck is Iveco. They had good engines, but rest of truck and wiring/brakes were bad. I see them around for $2000 or less at times. They still run, just brakes shot or such. They had Fiat engines in them, about size of Chevy six. ONe other thing on those delivery trucks is the engine and trans mounts are easy to switch to other frames, as they generally set on frame tops and Hang off them, rather than hold up from underneath.