833 Gear Pitting... Help!

Not only is the pin bad, the cluster-bore will look just like that. By this time it looks like you got almost nothing but the brass parts left to work with.
The back part of the cluster is where the torque piles up; that is the most heavily stressed area, and every time you take off from a stop, that area is working hard.

I would not spend another nickle on that box, it will only make you broker
Okay, Yes of coarse you are right... :-(