Somewhere, like under the hood or in the trunk, there should be a data plate with all of the vehicle's option and production codes on it. There should be something in there to designate which type and calibration of suspension the vehicle is equipped with. The decode list might be in the Chrylser service manual and possibly in the Chrylser parts database listings. In earlier times, the suspension codes were "S" codes, but the newer ones might be different.