You have a 3/4 ton if model 3600.
Hubs do not interchange with 1/2 ton.
Hubs do interchange with 1 ton, still 8 lug.

Compare front spring width, you may be able to swap entire front axle from 1/2 ton. You can for 48-54, I’m not sure on 55.

Also nothing wrong with having a 3/4 ton and 8 lug wheels. Why do you want to downgrade your truck?

•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-