Your easiest solution is to find a good used torque tube rear end. There are plenty of them out there as long as you find it before it gets scrapped. They are very often offered for free or for scrap price.
Many of these trucks got parked or abandoned due to engine failure at relatively low mileage which means that most of the rear ends are fine.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission