Check the next to last post in this thread
https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=603612&page=2
Listed are the part numbers that I think are for the original bearings, as well as some suggested part numbers for different roller bearings that might work with some machine work.

Grigg

•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-