how do i change out the rear air bags and install springs, and do i need a kit?

the bags are not that expensive and are cheaper than the kit for the springs. they are easy to change. check on line for the parts and even call ford for the parts. Roy

Google "Lincoln suspension air bag" lots of suppliers. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online