RE: Auto R/T does not get a Posi rear end?
I maybe mistaken but I beleive that if you go the 20"s with the 392 gears if should have POSi track. You should also automatically get the ESP with any of the RT. at least with the electronics 2 package.
I know that the 18" auto comes with 302 gears which I dont beleive has POSi, but the standards automatically come with 392 I beleive.