Message: I used the same axles on my swap and my 35"x12.5" tires stick out about 1.5". Rims have 5.5" of backspace. I installed a sensor in the Ford 9" and still have a full spool with a tone ring mounted on it that will mount right in the Ford 9". E-mail me at m.colantuoni@hotmail.com if you have any questions, I have already done this swap.