I also found an 'easy' way to get rid of the spot welds where the outer rocker, inner rocker and torsion box meet.
I used a sacrificial set of pliers and a hammer to use as a 'sardine can' opener - rolling it along the bottom pinch weld - it came out pretty easy and in a few pieces...just some spot weld remnant grinding to do before getting to welds in this area now.
I was actually surprised how easy this was instead of drilling out all the spot welds (that and I don't own a spot weld drill bit - yet).
I was going to replace the torsion boxes but they are in really good shape now that I am able to see in there.
I will hit them with some rust prevention paint prior to closing them up for good to reduce future issues in this area.
