I have a 30 car ore train for my lead/silver mines, mixed GN and NP, and did custom decals for the GN cars. Atlas had the NP in stock, so I included NP style numbers on the decals, but the GN was long out of production.
Naturally, they reran them a couple years later...
Put MT 905 couplers on them and they'll couple much closer, especially if the draft gear is recessed a little extra, with the pin at the end of the car. They still work fine with regular N MT couplers.