Quarter sawn white oak is my choice for good looks, durability, and reasonable price.

There are a number of readily available decking materials/boards for use on semi trailer beds, box van floors, and so on, most are imported hard woods. For a hard working truck that may be the way to go. Check with a truck body sales place.

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-