ok... but IIRC he has 97, so he has the newer body style and it was discussed heavily before over and over again that something changed and whereas you could stuff up to and sometimes including 30" tire on an older model, the newer ones made it harder.... so the fuct that your 91 works great with UC springs from a 99, the same springs are yielding less of a benefit on a 97+ so the question I present once again, why spend the money and effor on UC if they will allow for almost as much (or rather as little) as stock?