More pix:
Picked up a pallet and mounted four 4" swivel casters to it so I have a dolly to move the cab around the garage, added my work height too which I needed. Took a 65 grit flap disc and put it on the angle grinder, resumed cleaning the rust. Door seam had rust under the bondo, when I was working on it I heard a pop and thought the seam on the passenger side might have cracked? Don't know, there was a crack already in the bondo on that side and I sincerely hope this cab isn't falling apart on me. Found a small rust spot on the windshield seam, looks easy to patch.
If this thing is falling apart I may have to send it along with the old rusty one and have the donor cut up and used for patches. More to come...