They will fit if/after you bore the center of the wheels from 4.75" out to 5.25".

The bolt pattern is same 10 lug on 7.25" circle. Stud size may be 1/2" for some older models with this pattern and is 5/8" on the late model.

Your wheels can be made to work but won't fit as they are.
http://www.stovebolt.com/techtips/wheels/

•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-