That's ok, Jim, I'm sure I'll get to see a diesel truck's insides one day since I volunteer weekly at a local museum, and we've got diesels there (which hopefully won't break down).
While taking a hike through some of the "experienced" parts out back of the Chama engine house I saw a Caterpillar diesel which looked a lot like the ones in 19. I'm sure you know about it, but it could be a parts source, though the fuel pump didn't look good. Was this engine originally in the 19 or 15, or was it purchased for parts? It still has the generator on the back.
Mike