Even though I am a mopar guy and bleed Mopar blue my all time favourite 6 cylinder is the Jag six. Smooth , powerful good looking and well designed. Have workd on a few and built one once for drag racing although the guy moved away so I dont know if he ever finished the project or not.
Would like to have one more before i go to the great beyond. Maybe built it into a replica type track roadster single seater with a 3 inch pipe running down the one side.
D