Blasting uncovered a multitude of sins.. it's been bent and fixed/patched alot,. Before you order alot of stuff try fixing some small stuff,. Except for the pitting and rust holes that isn't that bad.. (have to remember these wernt galvanized).
The rust thru can be patched,. Take some measurements that tub has been bent just so you have a baseline and weld some braces in the doors and rear once you have it square.. (porta power for major moves). the mild pitting you can use high build primer sealer on,. I would cut out the major stuff and patch,. Passenger floor replace but the quarters take a hammer and a map gas torch to,. A big peice of angle iron clamped to one side to check for straightness and hit against helps.. body work is a good stress releiver especially with cruiser steel, map gas helps get it to move (start with something bigger than a body hammer). helps remember this isn't gm paper thin stuff..
It will take some time but I have seen alot worse..