[Logan]

Paint the body and put it back together. As long as the frame hasn't obviously been tweaked it'll be fine to use and if its already painted I wouldn't worry about it. I've put together some bodies/fenders on frames that were severely warped and it still looked decent when it was done. (Wasn't my decision to not straiten the frame). I would paint the tank out of the car though. As long as you're careful you won't scratch anything when installing it. And you get a better paint job with it out. To me it looks like you're ready to paint and put back together as long as you are happy with the body work.