17.5" wheels are a god option if they fit (sounds like it)
19.5" is also a very good option and with 8R19.5 tires will fill the wheel wells at about 31-32"

16" may or may not fit over the brakes and I think looks on the small side, or if you get tall enough tires they're wide and also look out of place.

•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-