My favorite NYC diesel scheme; I have the Atlas #1605, and mounted the fixed pilot /scale-y coupler for an excellent appearance, as on #1604, above.
Like scale 3RO steamers, unless you plan to do some switching or run it as a trailing unit, you can skip/fix the swinging pilot/O-gauge coupler on your diesels. My Hudsons all have scale front couplers, and they do just fine.