IS THERE ANY ALTERNATIVE FOR THE AIR RIDE SUSPENSION AXLE BEAM? THE PART IS DISCONTINUED FROM CHRYSLER AND THERE IS ONLY A HAND FULL OF USED ONES OUT THERE. ALSO DOES IT MATTER WHAT KIND OF SHOCKS I USE WITH IT ONCE I GET IT AND DOES EVEN AN AIR RIDE SUSPENSION IN THE REAR? I NEVER HEARD A PUMP KICK ON AT ANYTIME. HOW DO I KNOW WHAT I HAVE WITHOUT SOUNDING LIKE AN IDIOT??? DO I HAVE A COIL SPRING OVER SHOCK OR JUST COIL SPRINGS ALONE?