I looked at the numbers on the Dana 60 that I have under my '65 Coronet. The BOM is 602957 3 and the date code is 12 2 8 C1.

So I think that means it was built Dec 2, 1968 and went into a '69 B body car?

I bought this rearend about 30 years ago so my memory is hazy. I think it came from a Charger but it could've been something else. I know it had front disc brakes since I bought those at the same time. I might have also bought the front anti-sway bar and the Hemi torsion bars but I'm not sure. The guy was parting the car out and I grabbed as much stuff as I could afford.