Just wanted to give a update. I put the screws back in thru the cab into the bunk and now there is no cab to coach twist and the only movemt in the bunk is what I would expect from a over hang which is very very minimal.
Thank you for all the help on this.
Next task is gonna be taking off all the trim, reputty and install new screw trim. While I am at that I will do the roof , vents and such. Then comes the windows.
I hate when people just use things and don't maintain them.
1988 27' Class C American by Cobra. 7.5L 460