56-59 Chevy (not GMC) 1.5 ton.

The 2 ton Chevy and and all GMC used 6 lug Budd in that range (GMC may have also had other patterns but not 10 lug on 7.25")

But the wheels could be on any old truck with 10 lug on 7.25" at this point, same as you want them for a truck that didn't come with them.

•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-