The discussion we had about airbags and coilovers didn't really seem to bear fruit....I'm with you guys who responded, it's not likely to be an elegant (or simple) solution......and when it comes to 4x4 building, complex is NOT the correct direction to be headed!!! As I thought about it, the concept of adding torsion bars with a "disconnect" on the torsion "arms" might be a lot simpler and more elegant. Imagine that the torsion bars are installed laterally underneath the frame and "in-line" with the suspension links on the frame end. (In my mind I'm envisioning a converged "V" 4-link with parallel "uppers") Those upper links are basically parallel to the ground and would make a nice place to attach a torsion arm and a disconnect system. The theory is that the torsion bar could be fairly small in diameter (or I could use a long torsion arm to soften the rate)...this setup in tandem with the coilovers would provide the stiffer "street" rate....and then by pulling the disconnect pins/bolts, the torsion bars would effectively be removed from the equation to get the softer "offroad" rate. What I like about this idea is that the setup could be quite simple, and the disconnects would be easy to reach from each side when you get to the trailhead. ....anyway, it's something I've been mulling over for the last couple of weeks, so I thought I'd throw it out for discussion or rebuttal. I can post a sketch of what I'm talking about if the description above is not clear.