There are several shots of it in "Narrow Gauge..then and now" by Tom Gildersleeve. The consist was 492, 2 flats loaded with a what appears to be a crane on cat treads, a box car, 7 gons loaded with ties and caboose 0505. It ran ran as far as Rockwood. I've seen other shots of it years ago, but don't know if 492 set the train out in Rockwood and came back as a cab hop or what.
I know I've read the special instruction in an employees TT about not allowing K-36's and K37's beyond Rockwood, but a briek cruise through the timetable collection doesn't show this. There are no tonnage ratings given to the big engines north of Durango.