Keep in mind that if you change the tilt of the leaf springs by moving the front hanger (pivot point) or rear hanger up or down, you will effect handling characteristics. (understeer, oversteer). The same will happen if you raise or lower the front of the car without doing the back the same amount. Oversteer can be dangerous and easily cause the car to get out of control. ( The rear wants to drive around the front)
I suggest you sell the S/S springs and purchase split mono's and caltracs W/ ranchos and forget about ever having to wander about how effective your suspension is. If not, try removing some of the springs from the S/S springs and get just the cal-tracs.
Firm Feel has new front hangers that have multiple holes for spring mounting. Bill may have something similar. Dr Diff has some real nice front hangers but they are offset.