Okay guys, i'm ready for the biggest upgrade since the lift. YEP, i'm lockin' the rear w/an ARB!

So just a couple "make sure it's right" questions. B4 i order want to make sure i get the right one. Anyone have the correct part # for the Chrysler 8.25? It's the 29 spline correct?
Last question. i know hourly rates can really vary shop to shop geographically so the real question would be about how many hours for a professional shop to do this install? We've a local Jeep dealer who does actually work on modified Jeeps (Schaumberg--Chicago, IL) that i'm considering for the work. Heard a few good things about 'em, hence the question. If i know what to expect in labor hours then i'll at least have some idea if i'm getting jerked around.
And if anyone else in Chicagoland has other recommendations for the work, lemme' know.

Thanx in advance!