So far the upgrades include a Pedders street suspension package which lowers it 2-3/4" in the front an 3-1/4" out back, along with urethane sway bar bushings and upgraded endlinks.  Next on the list are Pedders shocks to replace the AutoRide system and that should round out the suspension nicely.  It already handles brilliantly but there is a bit of bounciness so obviously the AutoRide shocks can't hanlde the stiffer springs.