How wide are your springs center to center? 41.5"?
If so then the C&C axle with the 13x3.5" brakes they come with leave very little room between backing plate and your springs, difficult to bleed the brakes.
One solution to that is use those shallower drums and move the backing plate flanges toward the wheel 1.25" each side, or make a spacer to do same.
Again, https://www.stovebolt.com/ubbthread...-14-bolt-axle-swap-info.html#Post1249918

If you do the above it's not much more or less work that swapping hubs on a single wheel 14 bolt and also correcting backing plate location.

•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-