The problem is we can not tell for sure what engine/car combo they would have come from. I'm sure you have them and they have the OEM paint but they have been removed and the vehicle is long gone. This is where the guessing starts. Engine color will always be WHAT it came with, from the factory BEFORE being worked on in the field. There are few of them left and the plant never kept records. Why would they? It was an engine going into a car to get the piss run out of it. That's still cool you still have them though :)