When I can get back to the M813 in the yard, will snag the right clamp and swap yours out. Right now they have me walled out with bales of tin and stacks of crushed cars. I also fixed your driver's door latch yesterday. I cannot take much credit there, the screws were about to fall out of the back of the door and once I tightened them up, it opens and closes much better.
I want to pull a window regulator and see if I can fix JTron's driver's door. Does anybody know if the 800 and 900 series trucks use the same window regulator? His is stuck in the down position.