I too have a Ford Dana 60 that is going into my '52 3/4 ton. That is why this topic piqued my interest. I've done some measurements and they're pretty close, although it does look like the Ford Dana 60 will have a slightly wider track. However, I'm using year 2000 GMC 8-lug wheels on my truck, and the built-in backspacing might work out.
Mine also has a 3.73 with a broken pinion gear. I would imagine a new gearset and that would be a pretty easy fix. However, I'm thinking about 3.50 gears instead to drop the highway cruise rpm below 3000.
