GM had later model independent front suspensions with disc brakes and 5/10 lug on 7.25" same as your bolt pattern. Often found in bread trucks and such but obviously without the I-beam axle.
I have no idea what might be interchangeable. Probably worth looking into.

•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-