Is this a half ton truck? You appear to want "lift" for towing. Well, you don't need any "lift". If you are not overloading the truck rear end with whatever you are hauling or towing, your best suspension assistance is with air bags from Air Lift. They don't "lift" the rear but they keep it from going down with a load. As far as shocks, I am using Koni shocks. Have used them on several other vehicles. Most expensive shocks out there for a truck, but they are awesome. Fully adjustable.