The engine number is the serial number of the car that it was originally installed. CH41 is a NewYorker 4 door sedan. K indicates 440 4bbl engine 9 means it is a 69 C is the Jefferson Plant and the next six are the sequence number at the plant. The 52409th 69 vehicle scheduled at the plant. All of these make up the vin number of the car. Good luck. Darrell