I did mine backwards. I jacked both the body and frame up as high as I could get it, then supported the the body with jack stands and lowered the chassis from it. I then repaired the rust on the frame and body at the body mounts. Then painted the frame and underside of the body and jacked the frame back up to the body.
PAWN SHOP FIND
RESTORATION IN 1980...
"You can have it all, my emipre of dirt. I will let you down, I will make you hurt"