Alcan springs are made for each order, they take into account the type of 4x4 you drive and all the extras you've added. This way they can make the spring to the correct spring rate. I just installed Alcan SOA springs on the front of PYRO(w/ dana60), these springs have two main leafs to controll axel wrap but are still very soft. They are also 5" longer then stock which makes them even more flexy. I've also added 1/4 ellipitical Alcan springs to the back (w/FF14bolt)which came with the Avalanche Engineering kit. I should be finish with it all by next week,
can't hardly wait<G>.