Also, the 2WD and 4WD has nothing to do with lowering the rear. The only reason McGaughys has only offered the 2/4 is because the spindlet relocates the wheel hub up and does not change the suspension geometry at all. This means it does not change the location of the sensor arm. I have already have a way to go lower in the front of the Mag ride trucks just haven't had someone local that wants to go that low......yet.
Another advantage to the adjustable links, is it allows you to change the response of the Mag Ride with a simple adjustment with a wrench.