Ran the numbers on the rear end tag the other day when I was replacing the springs and found out I have a Maverick rear end in my 66. I knew it was not original because the end of the housing tubes didn't get smaller like all of the 65/66 do. It turns out it is 3/4 inch shorter than the original. Everything lines up and works well with the Maverick rear though. The car is originally an I6 car so I knew someone had put something else in there I was just not sure what.