Hellwig has a kit, the EZ-990, anyone know if they are any good for leveling the rear end? I have an 02 Screw 2wd and occasionaly use it for hauling gravel, brick, and machine parts for work. I'd like to get rid of the squatting that the truck does with 1200-1500lbs in the back. I realize that 1500lbs is alot of weight, but I'd be more comfortable driving if the rear was more level.