As far as rust repair goes, I had a '59 Apache a few years ago. Cab corners where shot. Pulled the bed, and carefully cut out the rust. Ended up mig welding new inner and outer cab corners on both sides. Used butt-weld panel clamps, drilled out the spot welds along the door post, was super careful about fitment, took my time with the mig, hitting a spot at a time, ground slowly and carefully, and once I was done, you couldn't tell that they were ever replaced, so I'm pretty confident that I can do a set of rockers and a rear quarter patch panel if need be.
Chris