@Rusty Traque posted:...This is really getting into the weeds.....
I find a that a general rule of thumb is to avoid associating a name with 4-8-4 locomotives. So many names it's hard to keep straight. Heavy Mountains, Niagara, Niagra, Potomac, Wyoming, Dixie, Pocono, FEF, GS, 520 Class ..... pick a name any name!
For the ATSF, I personally refer to them as 2900 or 3700 class locomotives right or wrong. My personal roster of ATSF steam is a little light however. Something to rectify at some point in the future.