They probably meant CB&Q, but even with that they're confused because it was sold to the Q in 1948... in Pullman Green with metallic gold lettering, it's simply a Pullman owned car.
And the Poconoke was a Plan 2410a. So it's not like they even picked a name that is correct for the model.
Jerry did all this research for them, and here are the Plan 3410/a cars that were also sold to the CB&Q but would be a better fit for the MTL carbody.
McKnight 3410A 25 May 62 Pullman green
McNab 3410A 19 Jun 62 Pullman green
McLeansboro 3410 5 Jun 61 Pullman green
Mackenzie 3410A 6 May 62 Pullman green
McQuesten 3410 27 Oct 59 Pullman green
McKinnell 3410A 14 May 62 Pullman green
But apparently no one has given this link to the art department:
http://passcarphotos.info/Varnish/Pullman_3410.htm