I have a 1 Ton Truck and need a 4" Suspension lift kit. When I check different 4x4 stores on the internet they usually sell only the 1/2 and 3/4 Ton kits. What is the difference between those kits and a 1 Ton lift kit (if there is any difference)? I understand that the U-joints that go around the axle can vary because a 1 Ton has bigger axles but is there a difference in the front springs and the shocks too? Does anyone know a 4x4 store or company on the internet where they sell 1 Ton kits?