Because the bed floor on my bed was so bad, we decided to pull the bed apart that came with the truck we bought and used for the frame on my truck. We will also use the wheel wells (my truck did not come with any).
Beginning teardown. The carriage bolts on this bed were a LOT worse than the one on the other bed. I did not have a single bolt come loose on the driver's side but had an amazing 3 come loose on the passenger side! So I cut as many bolts with the cut-off wheel as I could, while my brother drilled out the others.
Luckily enough when we got to the front panel on the bed, all of those bolts just came right out, which we were really excited about, because we were so sick of drilling and cutting bolts.
Then 4 hours later (really good I think since it was just me and my 15-year-old brother) it was all torn down and ready to go get sand blasted
It was a lot of work, but well worth it, this is the only rust spot we can find on the whole bed! We'll see what the sand blaster has to say though.