If you are adding that much, you should get the control arms for a 5.5" lift. The reason is that much addition will throw your castor angle off and make you prone to death wobble. Once you get that far up, you really need to start thinking about a kit for that height. It will be fewer headaches down the road and the cost will be about the same. You will also need longer brake lines, different track bar and a SYE to go with that. What are your plans for the rear?