The fox and SN95 8.8 housings are identical in width. What makes the SN95 wider is that they added an exciter ring for ABS and it the actual axle that makes the width 3/4" wider then the drum 8.8.
If you absolutely must have disc brakes with a fox width,.. try to score an SVO or Cobra setup.
8.8 is becoming a popular swap into Fbodies as well.
Hurst