904 questions - where is my 904 experts

I thought those old ones had the vin number on the bell housing near the bottom of the passenger side; on a raised pad? A guy brought me a 70 or 71 727 from a 340 challenger and the sprag was really loose; about to spin. So he was going to bring another case he had and just pitch the first one. But I saw a vin number stamped on it and asked him if it matched his title. It did. So we put a bolt in sprag in it.