The installation is similar to any other leaf spring install but we'll tell you how anyway.

First you'll have to jack up the rear of the truck and support the frame on jackstands. It needs to be high enough to let the rear axle hang free. Also it's time to remove the rear tires. Unbolt the shocks, and then support the rear axle assembly with a jack. Now all you have to do is unbolt the u-bolts and lower the axle away from the leaf springs. With the axle loose unbolt the front leaf spring bolts and the rear bolts at the shackle. The front bolt may be rusted inside the spring eye or it may break the nut loose from the weld inside the frame. If it starts to come out but the stops, then it's probably stuck in the steel sleeve in the bushing. You'll have to cut the bolt to get it out. If you can't get it loose at all, and it suddenly breaks you've probably broken the captive nut inside the frame. The only way to go on from here is 1 of 2 ways. 1.) You could cut a small hole in the floor above the bolt so that you can use a wrench to hold the nut. 2.) You can use a hole saw and cut a hole on the inside of the frame rail so that you can stick a socket through and hold onto the nut. Either way you're in for some extra work.

Once you've gotten the old leaf packs out of the way you're halfway there. Now install the poly bushings that came with the BOR springs make sure you use plenty of the grease that's supplied with the bushings. Also along with the springs you'll need to install an axle shim. I found that a 6 or 8 degree shim should do the trick with the 6" leaf packs. When that's all done you're ready to bolt them in. Install is the reverse of the removal. Bolt the springs into the front spring pocket and to the rear shackle. Then raise the axle into place with the jack and bolt on the u-bolts. Bolt the shocks back on (which may be too short for the larger springs.)

Bolt the wheels back on and take the truck off the jackstands and you're ready to go!