i just returned to the mustang ranks after about 20 years..got married and had kids..lol..previous mustangs were..71 fastback ..69 mach1..and a 68 vert..."new" one is a c code 65 fastbackwith a c4..my question is..what does an early 9 inch rearend look like?..the one in this car has no tag, but supposed to be a 2:80 open..however, the rear has 2 dimples, and drain plug, and tapered tubes..somewhere on this site i came across a link to the history of ford rearends, but cant find it now...any help?