Been putting a ton of work into the bus but there's been hardly any glory. After seeing signs of critters inside the belly pans I made the decision to pull them off, and boy am I glad I did. Luckily I think that for the most part I had either squirrels or chipmunks in here so the nest was never really wet.
Took me a good 6 hours to get them off without damaging anything too badly. I ended up cutting the flange off on the rocker side and I'll stitch weld directly to the inner rocker when I re-install.
To remove the rocker side of the belly pans, I cut about 1/8" above the bend on the spot welded flange. I came back after with the power file and ground down the spot welds and popped the remaining material off.
Then I removed the middle seat mounting brackets that are spot welded to the floor so that the The middle two were so rotted that I would never have trusted them to mount a seat to. I could easily have replacements waterjet and reinstall them but I never plan to put a middle seat in there.
This job sucked pretty bad. You can see the spot welds from the bottom but from the top it was impossible to see. I found the best method was to grind the spot welds starting at one corner, then bending up the bracket until it stopped and just kind of guessing where the next spot welds were. The brackets were absolutely toast but the sheet metal underneath is in great shape.
I cut out the rotted section of the front floor, as well as the botched frame member onto which the steering box mounts. I am going to dry fit the nose before I final weld this bracket back into place.