The Stovebolt Site Forums The Shop Area Paint and Body Shop inner cab rear wall supports?

hey guys! I am trying to figure out how the rear wall supports are attached to the cab. I have one that is loose. My drivers side is embedded in some kind of tar. The center one looks as if it is being held in place with some kind of seam sealer at the bottom.
The one that is loose is the passenger side.It does not look as if it was ever held in buy the tar like the drivers side. It is loose at the bottom. My question what was the factory method of holding the supports in place. Here is the link to some pics in my build thread.post#154
http://67-72chevytrucks.com/vboard/showthread.php?p=6826187#post6826187

forgot to say that is a 46 1/2 ton ....sorry

The factory did not use any seam sealer or tar. The bottom end of the support was spot welded to the floor pan flange. The top end of the support was spot welded to that brace that runs along the back of the cab and attaches to the door frames. The supports were attached before the sheet metal back of the cab was installed. I would reattach them by plug welding them where the spot welds used to be.

Ok now its starting to make sense. It looks as if I have one hell of a problem. The support in question is not long enough for me to weld it back the the floor pan. I think what has happened is someone before me, cut the bottom of the support loose to try and do some body work on the back of the cab. I guess my best bet is to place some kind of blocking in front of the support on the floor and try and weld it to the floor.