The "new" 22.5" rims can be found in junkyards pretty easy, as GM used them for a while.

If you don't want to buy new ones then start calling around and asking for either lock ring 20" wheels or 22.5" wheels with your bolt pattern.

Grigg

•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-