The floor supports are rotted out (gee, with wood inside metal channels underneath who da' thunk) and a small area of floor has pitting. So, odered new supports, floors and tail area where a prior genius cut out holes and inserted aftermarket tail lights.
Rather than spend time patching holes I thought it prudent to install fresh steel and give that Miller a real workout stitch welding. The frame is almost perfect as in only flash/surface rust in some places but I was taken aback how clean everything was. Lucked out.