I ran 4.56 gears in my 1 ton with a 55 model 235, and 8-19.5 tires at about 32" tall. It would run about 55 MPH at 2600 rpm. 50-55 seemed most comfortable but would go faster if necessary.

Took about an 8,000 mile trip in less than a month, so plenty of time to think on it, and I would have been better off with 4.11 gears.
But then back around town and in the mountains 4.56 is pretty good.

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-