That's what I would do, and run 8R19.5 tires.
They will fit, I have them on my 1 ton, and are a tad taller than the 17" ones I had.

If you must have your original centers with new rims, call Stockton Wheel. They may be able to help you. Be prepared to wait a long time and listen to lots of excuses as to why your wheels are not done yet, some of them actually being true.

•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-