Ring gear and pinion swap questions

i would get all bearings/races and seals for it because for what i costs it makes no sense to not do it while its apart. as far as which bearings you should be able to get same ones but if you want to be sure just set the pinion and the carrier in the case to make sure it all fits good or measure them just to be safe.

but the gears should swap from one to the other

https://www.hemmings.com/magazine/mus/2007/01/Chrysler-8-1-4-inch-differentials/1393164.html