I'm looking to upgrade my 7.5" rear end and change to disc brakes but I want to stay with 4 lugs. I found a craigslist ad for a "1993 Cobra rear end including breaks" The guy swears it's out of a 93 cobra and it does have 10 1/4" 4 lug disc brakes which I think is correct; but he says it has 3.55 gears and the pic of the axle tag says it came with 2.73 gears. I though the cobras came with 3.08 gears. I did some research and the number on the tag leads (S215C) me to believe it is out of a 00-01 mustang but how does it have 4 lug axles then? On the other hand its date code is 3E12; what is he really selling and will it still work for what I'm trying to do, if so what should I pay for it. BTW I need to drive 6 hours round trip to pick it up.