Here is the Passenger side...not as bad.
Here is a hole in the upper driver's side of the bed. It looks like it could have been for an antenna, or possibly a fuel tank in the bed. (there was a fuel diverter valve in the cab.)
Here are the rear cab corners... again the drivers side is the worst by far. I think the damage was compounded by a failed repair attempt via duct tape and fiber glass.
I have one more small piece of the passenger side floor to replace and then I'll get some more pics of the repair posted.
Til next time.