So I picked up my BBP 8.75 a couple days ago. It's from a 66-70 B-body, so it should fit under the Demon without much hassle. It's a 742 case open 2.94 center section

I took it all apart, and this is what I found:

Before taking it apart, I turned over the gearset from the pinion. No backlash either direction from the pinion itself, and the axles turned nicely.

I took the axles out first and checked the splines. No issues with the splines that I can tell. No chipping, warping, or twisting.

I took the chunk out to look at it (and count the gearset) and it looks good inside. All the teeth look fine.

So i need a little schooling on what I need to/should replace, what I need to/should buy, and how to clean it well!