With the passenger side having lots of little holes and with the forklift damage, I just decided to replace all the cabin floor pans. I plan to use the one piece AMD forward pan and the two smaller rear AMD pans. A couple Saturdays ago I got the wild hair to dig in so I got the chisel out and fired up the compressor. This picture shows how solid the driver's side pans were. I didn't find one perforation on that side.
Once the big pieces were cut out, I've been slowly but surely grinding down all the spot welds.