N&W U30C #8000 at South Yard in Roanoke, VA in this May 1977 scene.

They say that the N&W wouldn't designate a "F" (front) on their dual controlled locomotives but judging by the location of the bell on U30C 8000, I'd say old habits die hard.

NW 8000 trailed by NW 1500 (many zeroes!) behind the passenger station in Williamson