raise and lower...ALL IN ONE!

[lincolnmaster80]

Ok, so the title may not be as catchy as my question, but if it made you click on my thread, maybe you can answer! I'm looking for an air lift/lower suspention. I purchased a set of off-road tires (32/350x20's i'd put the rating but I can't remember what it is off hand) and the truck came with a set of Hankook Ventus with 20' Boss Motorsport rims...I don't have the factory rims. Now here's what I want to do. Get an air suspention that I can lower it below stock height for when I'm cruisin around the city and raise it for when I do some four wheelin' and swap out the tires, if that's possible to have a 2-in-1 system like that. From what I can tell, I can only have either/or, not both. I can either lower it from stock height and back again, or raise it from stock height and back again, which isn't what I want to do...I want the best of both words (cake and eat it too?). If anyone has any info, at least a name, of a company who manufactures such a design, can you let me know? At least someone who may be able to custom make this idea?

Thanx in advance.