Work is cutout, I don't think there is much left to sandblast, but a good journey is ahead.
Good luck, support the body, as suggested, to keep it from 'folding up'.
The doors actually keep the body straight when the doors are closed.
See the wedges on the door jam and door? Don't lose them and keep the same wedges and shims per side, very important to keep the factory body alignment.
Last item, correct year!