Sorry I must have been half asleep when I wrote that . The motor does not have a vin # on it. The build date is VI220MO What really upsets me is thinking about all the stuff I threw away. I had a big commercial building and part of it was my toy shop for all the stuff my Father left me. I sold the building in 05 and I threw away tons of alternators,starters,water pumps,exhaust manifolds distributors and flywheels. I can only imagine how many 837 alternators were in that pile . Oh Well ! My Father was a hoarder !!!