It will fit!, but you will have to cut off the 4-link mounts and weld on leaf spring perches. determining the leaf spring perch location shouldnt be hard since you have the old axle to compare to. Cut off the 4 link mounts, grind smooth, find your location of the leaf spring perches and have a welding shop weld them on. I wouldnt think it will cost that much to do, def be cheaper than doing a gear change to another axle.