If you include a picture of the installed transfer case someone might recognize if it looks correct or not.

Keep in mind that for that size truck whatever model transfer case it has would have likely been used in other applications and may have a variety of mounting bosses and options, some unused in any particular instillation.

•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-