New forum group, Nor-Cal Mopars

Just setting up a ring and pinion? Or does it need to be narrowed too? What all needs to be done?

If it's just a ring and pinion install, I can help you do it. 8-3/4" third members are a breeze to setup. Otherwise, I've heard pretty shitty things about Jaws Gear and Axle, so I'd stay away from them.
JAWS has pretty good reviews on Yelp. Mostly 5 stars with a 1 star back in 2017.
I used them in 2016 for the Dart and Coronet. The Coronet had 3.23's which were too tall for the cam, so I had them swap the 3.55 SG from the Dart into the Coronet. Then I ordered 4.10s for the Dart which they installed. Both were 489 casings, and I brought them just the pumpkins and reinstalled them myself. I only have good things to say about JAWS. The shop is immaculate, everyone was friendly and helpful. And most important, both cars have been running without issues for 7 years.