The first question you must ask is, how do you use the truck. I.E. hauling, towing, trail riding, fast dirt roads (pre running) desert running ect. In my case, im building my ST for fast desert running, and no hauling/towing. I went with extended shackles,and currently it has a short,thick and overly stiff add a leaf, thus limiting my rear wheel travel for my needs, and the ride anywhere id too stiff. I am replacing the add a leaf with a long thin add a leaf. This allows for all avaiable wheel travel without limiting it. And with the longer add a leaf the rear suspension will work the way it should. The way it handles and rides at off road, speed or even around town for that matter is fundamentally wrong gurrently.The weight transfer is not there and thru corners it feels like its on ice.I removed the rear sway bar in hopes to help. It has, but we certainaly need to soften up the rear spring rate. Then, you should use a high quality set of shocks. Im a Bilstein guy myself. Hope that helped. Good luck!
