Ok,here is what I need help figuring out.I have a friend with a 1979 Mercury Cougar XR7,rear end is the only thing left.Trying to figure out if it has an 8.8 or a 9 inch.Couldnt get under car far enough to get any numbers,however the end of the axle shaft has 4 holes in the center section,not one big one ,not 2 small ones with a smaller one in the center.I personally have never seen one like it.Does any one have an idea as to its size? I have looked on several other sites but got no indication as to what I am looking for.