I have a 54 3/4 ton. I have a third member out of a 68 suburban ready to go. but that will only give me a 4.11 rear. The 3.90 gears folks talk about are near impossible to find. I have yet to find a set.

The ford idea came from a guy at patricks. That was the first time I had ever heard of such a swap. He claimed the wheels would even bolt up.