The front uses torsion bars, which can be adjusted easily enough for ~1" +/- variation without ride problems (supposedly). Not sure if there's a "how to" on this site for doing that.

If you really want to improve your ride (like I do), you could put coil springs up front, but that would involve some reengineering of the suspension. I may go that route in a couple years, but I'm going to stick w/ the torsion bars for now.