To add lift to the rear of your truck, you would need a larger block, add-a-leaf kit, or new leaf springs. The rear shocks do not add any lift on their own, but they can handle more ride height than the factory shocks. That all being said, we don't recommend taking the front coilovers past 2.5" of leveling unless you're planning on also adding in an aftermarket upper control arm. What size rear block you should use is going to depend on what stance you want for your truck. Your best bet would be to call us directly at 623-434-5277 so we can get more specific about what you're going for.