I wanted AIR RIDE on all 4 corners, but using a stock k-frame suspension instead of replacing the entire unit took some modifications.  The recommended shock from RIDETECH had a 4" bag to clear the a-arms during suspension travel. A few math calculations revealed that the air pressure required to lift the front end off the ground would cause a very stiff ride.  I decided to re-calc using 5" bags and found I could lift a 1,000 lbs more @ the same air pressure.  SO began the modifications to move the upper shock mount and change the a-arms to clear the 5" bags.  The results were amazing.  The car sits a ride height with about 80-85 psi. PERFECT!