If you have a torque tube it’s not a 3/4 ton.

If it is a 3/4 ton this tech tip will help.
https://www.stovebolt.com/techtips/axles/1%20Ton%20Upgrade/

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-