Lee robb

Hi i have a question about how to set the rear of my car. I put a new MOSER 9" in car and i am tryin to put a nice stance to the car. I have ws6 wheels on it know and it is lowered 2". I want to put draglites on it and set it up for street and strip. I have seen pics of cars on here that sit really nice with a 28 or 29 inch slick and weld wheels sitting under wheel well. What do i do to set it up like that and keep quarter panel from slamming down on wheel. All help is appreciated