From SRHA Archives Presidents’ File Box 662 File 11670, the consist(s) of Southern Railway train Nos. 1 and 2 as of 11-15-71.
I have to search for the slide but I think (!) I have a photo of a SP sleeper that had come through NOLA . In the early 70s, it was not uncommon for the trains to have a N&W (blue) coach.