Diff question

What you scored for 50 bucks is a Dana Powerlock sure grip unit. That's the strongest 8 3/4 carrier Chrysler used.
Excellent!

I just ordered a bunch o' stuff and will plan to assemble it all on the bench before putting in the car to see if the sticky spots in rotation go away once I don't have chipped gears. I'll certainly avoid opening the SG unit unless proven necessary.

Thank you all for the tips - I'm sure I'll be back for more guidance once I get the parts in and get to work on it.