EXCELLENT ADVICE! The biggest thing you have to concern yourself with is making sure you do not distort the body, which will happen if you're not very careful. Trust me, checking, double checking, dry fitting, etc may sound like a PITA, but it's nothing compared to the nightmare you could face when you try to put all that stuff back together and it doesn't fit together properly.
if you can jab a screwdriver thu replace it. suggest hanging doors to check gaps - if doors need work do them first. i use all thread rod & turn buckle in middle & tack welded to inside of cab. can adjust door frame to get right gaps. then i do floor work. u can buy panels or make urself from flat sheetmetal. not doing total restoration doesn't matter as long as it is strucurally strong. looks like cab is on dolly i would mount it to frame to make sure everything is lined up - bolts snug in frame mount holes before welding anything up.
