New/Old Monte Carlo owner. First Monte was a 75 in high school. Sold it off after school and now 35 years later i bought a 77 Monte. In looking up the VIN i can see that the Assembly plant character is a K. I am assuming that this is the Leeds Plant in Kansas City but looking to get confirmation.

 

Welcome!
As for confirming the assembly plant, I wonder if calling the GM Heritage Site might be of help.

 

K is Leeds Missouri.