we are looking at a ram but with the 6.4 gas motor and are also trying to decide if we want the factory air option or go after market, I can not seem to find any information as too if there is any payload rating difference between the air bag set up or the standard leaf spring setup. I know the gvwr is 14000 for either but not sure about any difference in camper weights and payload rating. I don't have the numbers with me but the configuration I am looking at which is two wheel drive gas DRW crew long bed I recall has a camper rating around 5900 lbs and the payload is over 6K but nothing noted that that changes with air setup which in pictures just doesn't look very heavy duty?