You can by a 12v air pump and that way you can use it for air bags and your tires.

 

I am new and found a post by AlCorr trying to sell an airbag system off an F150. I cannot email him direct because I am new, can someone ask him to email me please. I need to know if he still has one to sell.
Thanks

 

unload the truck.(in park) take measure of the bump stop to the spring perch. load the truck. measure again. try to get about 3/4 or one inch drop when loaded depending on springs. must be on flat ground and chock the trailer dont set the truck brake on the truck and dont put it park. i think you'll like what you get.