I want to change out the 8" to a 9"rear. But i have no clue on where to start. Well I guess what i need are the dimension for a 9" rearend that will bolt-on to my 66 mustang. What year and model has a 9" (with the larger bearing if possible) that will fit on my 66 mustang. I dont care for the ratio or if it has a posi. I was looking at Currie for a custom rear but again i was stump when it cam to the dimension. I'm guessing all 66 rears are the same dimensions, so can anyone please give me the complete dimension for a 9" rear to fit on a 66 stang.