Should work just fine.
The 50 cab has mounts at the back on each side of the frame, you will need to drill holes in frame rails for them if not already available.

The 48 cab has a single center rear cab mount, can't use that mount in later cabs.

•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-