are SS springs enough

I'm running SS springs on my Duster. The important thing to get them to hook is your pinion angle and since there is a little more arch on them, the angle of the rear hangers (shackles) might need to be adjusted. I had to put 7/16" solid aluminum spacers on the front perches to move the springs back enough to get the proper rear hanger angle. The rear spring eye needs to be directly below or behind the top of the rear mount or it won't hook. Behind, at about a 5 or 10 degree angle, is good.