Had a guy come in with a rear end needing complete rebuild for a "tribute" T bucket.  He thought he had a 9".  I looked at it and said no, not even an 8".  Was convinced it wasn't even Ford until I took it apart and found the oval and part numbers on the ring.  After a week of chasing part numbers, found it was used on some 56 only cars, but not wagons or T birds.  Believe it or not found every bearing and seal except the pinion seal which I had to do by sizes, and had to "manufacture" a spacer/ shim kit to set the pinion preload.  This must be the predicessor to the 9" in 57? as it seemed pretty light duty.  A completely new one on me and thought it might have some serious value for a restorer.  Anyone else ever come across this or did I just forget my history?