Which part of the Oklahoma Sub to model

I’m modeling the Santa Fe’s Oklahoma Sub which runs from Ark City, KS to Gainesville, TX but, I’m debating to model either from Ark City, KS to Oklahoma City, OK or from Oklahome City to Gainesville. Ark city to Oklahoma City is rather flat but, from Oklahoma City to Gainesville would have the Arbuckle Mountains. Which would be better to model. The time frame is from 1995-2000.

Ch

I have thought about modeling the ATSF mainline that ran west of Tulsa along the Arkansas River. The scenery could be really interesting. I am not sure where this line ran west of Lake Keystone, but I think that it tied into the line you mentioned.