I bought some F150 coil springs from JC Whitney for the front. They measure roughly 161/2 in not compressed. They weren't too bad, but you can go to a junkyard or find some on ebay just as easily maybe. I went with an add a leaf and shackle kit for the rear. I got about 3 inches out of the rear. If you have a grinder and air tools the add a leaf and shackles is a nice way to go.