8 3/4 Rear Disc Brakes

well its easy enough to figure out that the 8 3/4 has one more mounthing stud at the bottom of the housing for the backing plates, thats the only difference between the two! if a guy couldnt figure that out then they shouldnt really be working on a brake system anyway. sorry Brambles just trying to help, but some people are here just to correct and criticize! dont they have anything better to do?