I bet Reese could help you here... http://www.airsuspension.ca
His BOSS kits will run at 0 PSI if wanted and are rated for more weight than you'll want to increase your load by.
Etrailer has lots of options for the 2500
http://www.etrailer.com/Vehicle-Sus...ess+Van/2004/F2337.html?vehicleid=20041007595
Hope this helps.
Etrailer has lots of options for the 2500
http://www.etrailer.com/Vehicle-Sus...ess+Van/2004/F2337.html?vehicleid=20041007595
Hope this helps.