Also, you have a 1 ton which generally have larger brakes than a 3/4 ton where most 4.56 gears are found. So the brakes that come on that axle may not be useful to you.
That axle also likely from a single wheel truck so studs are shorter than you use with your dual wheels.

•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
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-