There is not one "donor vehicle" that will always have 6 lug Budd 22.5" wheels. They could be on most any make and model 1.5-2 ton and/or what they call "medium duty" trucks from about 1956 on to today or not long ago.

•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-