Looks just like on my AD trucks. Might do some parts manual research to confirm. Not sure I have a 58 or later manual to check for you..

So likely the same, opens up your search to most any old 50's GM not 1/2 ton and under about 3 tons or so.
Any junkyards locally?

•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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