So, it has been a while since the last post, and we have been making some progress. Took the bed completely apart and replaced the rear 15" portion of the bed floor. Along with filling in numerous holes in the floor upfront. Purchased a new front section from Fix My Rust. They had free shipping in November that I should have taking advantage of for more parts.
After many weeks of welding, and body putty, both sides are straight, the wheel arches are filled and straight and bed is back together.
We had to also remove the bed floor brace to clear the relocated gas tank.
With the bed in pieces, it was easier to build the bed on the truck a piece at a time. We had a nice day in January and rolled the chassis out on the driveway and made some progress. We also completed the fuel line install before the bed went on.