I'm of the opinion the "newer" springs are junk. I have both new and old, the newer are 1/4 inch thick and the older are much thicker. Contact a spring maker and have them build each leaf .350 -.375 thick I don't think you'll wrap those up (doubt you'll need more than four-five leafs). Don't remove the clamps-strap on the rear segment of the spring, then they won't separate and catch the valance. Also overlooked, the back segment has as much to do with how the spring works as the front. Be prepared to ride like a tank.