Here's another image taken by Brian Ambrose and shared with his permission. Here we see GP7L 1826 with possibly 1831 and another unknown 18xx. The location is the Burlington Northern Interbay Yard near Seattle WA. 12/04/1975. I believe these were also heading to Paducah KY same as 1825 for rebuilding. I also believe 1831 was the second unit since you can see the spark arrestors and as far as I am aware only two 18xx had them. After rebuilding 1826 became 1803 and 1831 became 1807. 12-4-75 - Commentary by Mike Gerenday