Look in a truckin magazine there always ome advertisement for some company making a bolt on 4 link, if i was you id talk to a shop about building you a 4 link, talk to jon (dbrods) on here he can get you started on what you need, also why are you narrowing a nine inch, why even use a nine inch 500 hp isnt enough for a narrowed 9inch IMO just a waste of time effort and money.