I'm told because the 9 inch pinion is 2.5 inches below the housing centerline and the 8.8 pinion is 1.5 inches below the housing centerline that this will not work. I got a beautiful 3.70 truetrac rear end just ready for any fox body mustang. I cant turn back now. Please, anyone with experience on that give me a little help. No, i have not received my 33 kit yet. It will come at the end of the month, but i'm already sweating the issue.