Another successful evening in the garage even if it doesn't seem like it.
At first it seemed like this pan was money in the bank and that I would not have to modify it at all. My exciment was short lived though as I realized I had to make the same backslash slice to close the gap as I had to make to the other side rear pan. Then on top of that, I had to make a lengthwise slice through 3/4 of the panel because even with the backslash cut, it was still 1/4" low of the cab corner. Now that I've got those two splices cut and welded back together, it is sitting pretty nice. I also took a gander at my to do list tonight for the first time in a while and was able to cross off all but three of my tasks for the floor repair!