Only thing that makes the air shocks different is the fact they have a air line to disconnect, pretty easy, just make sure you pull the fuse for the pump before you start.
On the fronts, well , if it aint' broke don't fix it, you know?
Clicking is normally the axle, however a bum strut tower bearing can sound similar in a way, but should sound a little more like it's coming from behind the dash rather than under the car.