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.