This is A-B-B-A lash up of GP60.
EMD SDP40F
C&NW 1490 purchased second-hand from Precision National Corp Mt. Vernon, Ill. January 9 1973 and re-powered by EMD using 1,500 horsepower 16-567C engines and GP9 style long hoods.
Sitting at the Arkansas and Missouri's shops. IIRC was to be parted out to keep their other Alcos running.
Awaiting their train at the IC's Markham Yard.