I have a 1976 K10 1/2ton and I am experiencing an unusual amount of body flex. This week I was wheeling in the Moses Lake Sand Dunes and got stuck fully articulated with one rear tire off the ground and the truck body and bed flexed around 6-9 inches, somewhere around there. For some reason this doens't sound right. The bed made large scratches on the body for rubbing it while articulated. Also the steering coulum was all messed up and I could't get the tranny in the gears i wanted because the coulum was so twisted. I know my steering box area isn't broken and I got a brace there. It all lines back up almost straight, the way it has alway been, and drives fine once it was level again. Could this be do to bad body mounts? Any other ideas? Im afraid im going to twist the frame. any ideas would help a lot, thanks.