I primarily model (N scale) Santa Fe in southern Oklahoma in early 1970’s. I want to add a Santa Fe & Frisco interchange representing Ardmore OK. My limited research on the Frisco indicates that the “Arkinda and Ardmore Subdivision” operated a Frisco line that stretched from Hope Arkansas to Ardmore OK via Hugo OK and Madill OK. One source I found said train operation in the 1970’s was as follows: “Trains 3911/3910 operated as tri-weekly locals between Hugo and Ardmore picking up and setting out shorts, switching local industries and working the KOG (TP) and MKT interchange at Durant and the ATSF interchange at Ardmore. Local 3910 worked Sunday, Tuesday, Thursday Hugo to Ardmore and Local 3911 worked Monday, Wednesday and Friday Ardmore to Hugo.” I think the line to Ardmore was abandoned in late 1970’s but it was active during the period I am modeling. Frisco also operated a “Motor Car” for passenger service but it was discontinued in Nov 1953 so I do not plan to include the Frisco depot in my layout. Everything will be freight exchange between the ATSF and Frisco. I would like to have one Frisco engine (DCC) to work the interchange in Ardmore. Unless the Frisco maintained a dedicated switcher in Ardmore, I assume the engine(s) used on the local trains 3911/3910 were also uses for interchange work in Ardmore. When I google the subject, a GP-7 (orange/white) frequently shows up. However, I have not found where anyone produces a N scale DCC ready Frisco GP-7 in orange/white. If true, I am OK with any other Frisco engine (DCC ready) that would be appropriate for that location and time period. What engine would you Frisco experts recommend that I look for to represent the Frisco in that interchange? It must be DCC ready or already installed.