As for the Cat, looks like an old slide shifter D8.
The Cat looks like a Diesel Fifty.
Correction I think a Diesel Forty. Looks to be a three cylinder.
Yep, definitely a 3 cylinder with the water pump tight up against the pony and the distinct 3-ported exhaust manifold. Love the old split front idlers on it too!
https://en.wikipedia.org/wiki/Honolulu_Clipper
Daron
Diesel 35, air cleaner for pilot motor mounted near diesel tank.