With the amount that the springs move your axle foreward you will have to go to a cross over steering set up. you will also usually have to add a few leafs to the pack to compensate for the extra weight on them
Nub said it all.... I use rears up front with some s-10rear leafs added. I built a drop spring hanger and even without it the springs alone would have moved my axle far enough forward to justify the push pull box unusable.
