Can you share some pictures of your spindles and or look up what king pins it uses, assuming it has king pins?

Problem with just trying to swap hubs is you still have a spindle that takes a drum brake backing plate.
Advantage of swapping spindles and everything outside of them is the spindles from a disc brake truck already fit the right disc brake caliper brackets.
Modifying a couple king pin bushings (if not a direct swap) is less work and a cleaner solution, possibly safer, than designing and fabricating a caliper bracket.

Ed is trying to steer you toward axle or spindle donors that also have 5/10 lug on 7.25" bolt circle, same as you already have, and these are one step up from 8 lug 1 ton stuff.
I agree, for a working truck don't downgrade.
The disc brakes for the 5/10 lug axles also have larger diameter rotors than the 8 lug versions, which is a good thing.

Last edited by Grigg; 07/26/2017 1:50 PM.

•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-