833 Gear Pitting... Help!

I’m with RRR. Get a good used reverse gear and 3-4 slider or new if you can’t find them used. I’d glass bead the rest of the gears and send it.

When I was breaking gear boxes every weekend I used gears worse than that. Just make sure they are clean so none of the ruse and scale ends up in the box.

It will be fine.