Over the week, I had a '58 Chevy fleetside bed dropped off for some rust repair. The outside of he bed is spotless. I am surprised how well of shape it is in. The inside, however is a different story....especially all of the sub-structure. The more I poked and prodded, the more rust I found.
After getting the bed unbolted, I chose the worst side and began dis-assembly. The main rear upright was completely gone on the inside. The only way of getting to it is by drilling the spot welds and removing the entire structure.