The thread link I provided earlier does explain how to use a Cab and Chassis 14 bolt and how to move the spring perches, also swap to a shallower offset drum if you like, makes more room to bleed the brakes.

I’ve measured the various 14 bolt axles and evaluated the different brake options and combinations possible with the axles from various applications.
If you want to keep the tires same spacing as stock then I strongly believe the Cab and Chassis axle is the best fit in a 48-54 truck.

•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-