I would never use red oak for a truck bed due to the ease with which it rots. Any wood kept dry and painted/sealed will last but you can't always do that so use a rot resistant wood from the start.

If you want good dense southern yellow pine or even heart pine you can find it if you look. Very few woods are unobtainable if you look and are willing to pay for what you want. lots of reclaimed/recycled wood available and dealers of the same.

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-