On my list of things to do before next summer is a Irs conversion and wider back wheels on my 98 Cobra. I know that the axel will be a tad bit wider so i want to know if i could run 10's on back. My car is lowered on eibac proseries springs for now and I want to maintain that height which I think is about an inch drop. What do you think? Also if you know of a good place to get more information on irs swaps let me know, I am always interested in books and articles about modifying Mustangs.