I don't know where you are in MI but this guy said this is a 3 speed auto from an original 85' V6 Regal but he did not know for sure if it was a 200c.I seen that sold now
He has had it a while so I would think he might not still be firm on the price.
https://detroit.craigslist.org/wyn/pts/d/dearborn-buick-regal-transmission-v/6816377628.html