If your in the flat part of Texas I think they're a good first choice and given you don't expect to haul a lot.

Around here in the mountains 4:10 is a good choice with the original or similar engine. Sometimes on the highway unloaded a little faster gear would work.

•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-