Got some time to work on something that was gnawing at me at the back of my head...the rear cab mounts. As you can see from the first pic they were pretty dirty, but hey they've been under a truck for +60 years.
So I attacked it with the wire brush on my grinder (boy have I got my $14 out of that thing). The second pic is with one mount cleaned up and taken apart.
The third pic, looks like someone got a little over-zealous trying to take the cab off. Remember, this is a Chevy cab with everything else GMC. I guess a repair is needed.
The fourth pic, is the repair.