To figure out what gears you might like do some math, input your numbers in a gear calculator and see what makes sense for your driving style/speed.
http://www.onlineconversion.com/bigger_tires.htm

I’ve taken very long trips with a 235 and mine seemed very comfortable at about 2,450 RPM, all day long, much faster and fuel mileage suffered.



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-