I can't see what lowering it 1/2" or so on both mounts would do in terms of pre-load, its just basically going to rotate slightly. I wouldn't worry too much about endlinks, since many of us drop our cars 1.5-2" without ever worrying about end-link length. IMO spacing the sway bar downward would have the same effect as dropping the suspension the same amount. That being said, you probably could bennifit from the end links being shorter since idealy you'd want the ends of the bar sitting parallel to the ground at ride height, as opposed to inclined upwards.