68rs327,
If you look really carefully, you will notice that he has widened the bed and used a Fleetside Tailgate on it. He has also added tubs to the inside of the bed to cover the wheels.
Another member here (obs2kl) has a pickup bed on his '55 (I think) truck. His bed is not tubbed or widened, but the fenders have been spaced out 8 1/2" by a bodyshop that owned the truck previously.
I'm planning on doing something similar to my '57 3600. I'm planning on using Dually running gear and am planning on making my fenders wider by splitting them apart and adding a piece to them.
Photo
