Unless I am mistaken, there is no difference in the width of the rear end housings between the Fox body cars and the SN 95 cars. The difference is in the length of the axles used. When I swapped my Fox rear end over to the SN 95 chassis all I did was swap axles for the longer 94-98 axles in order to move the wheels out further into the wheel wells. I could have gone even wider by using 99-04 axles.