Hey JB,
My bed structure was all rotted out underneath - I could have ordered a replacement bed but I really wanted the Bed & Cab to be original to 1950 so we did a little re-engineering to stiffen it up a bit. Needed a big piece of metal between the rear of the truck & the tank as well as we aren't running any bumpers. I've seen some guys on here put armor in over the top of the tank as well.
Ben