They look really interesting....especially the air ride one...BUT...I would consult a real engineer. I would be concerned with lateral strength of the AS frame rails as a solid axle distributes lateral forces over 2 frame rails. I am sure it could be modified, even if it meant welding tubes from frame rail to frame rail. May not get much weight savings that way, but the suspensions look really good...and serviceable.
"If the women don't find you handsome, they should at least find you handy." - Red Green