A simple search for "rear end swap" turns up 15 pages.
Okay Bob, I'll bite. How is the suspension different on a 1950 3/4 ton truck than any other open driveline truck? Find a rear end you like with similar measurements in the tech tips section, grind off the spring perches, line it up, weld on the perches and U bolt it together. Get a driveshaft made and you are off to the races.
I think if you follow the instructions for swapping out the entire rear end on a 1/2 ton truck, pay careful attention to welding on your spring perches and setting your pinion angle correctly, you'll be just fine. Its actually easier to swap the entire rear on a 3/4 ton than a half ton if you ask me.
If you are going to use the 4 speed with a fixed yoke, you can choose to use a carrier bearing or a slip drive shaft, or both.
