Original brakes will work but you have to move the mounting flange for backing plate.
There is no combination of original parts to simply bolt brakes on a single wheel 14 bolt axle with hubs from a dual wheel axle.

•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-