Rear Shock Replacement/Recommendation

[azoffrd1]

Hey all..
Today I was going to replace my rear shocks with Rancho RS9000's
When I removed the rear shocks I realized that the OEM shocks were gas charged. The new Rancho's are not. My rig has the air suspension system. If I remove the OEM gas charged shocks does this affect the performance and/or tongue weight capabilities of the rear end of this vehicle, or will the back end ride height suffer or does the ride get better? Any help will be appreciated.