If the 08s come with a one piece it will go right in with removal of the mid shaft bearing bracket. Several have put the one piece in place of the two piece in certain models which escapes me. Like 2500 4x4 or 2wd etc. Chrysler says won't inter change put they do just by unbolting that bracket. If the 08s are a one piece and the 07 isn't they will swap.