Just finished a 10th repaint of this type of car. It takes four different decal sets including one custom print to make these cars.
With K4 you need the QA&P GARX set and the set for Frisco 86’ autoparts boxcar. I got the coonskin logo from a Microscale, and the “southeast-southwest” lettering was custom printed. I like K4 products because their decal film is sturdy. Handling one huge decal like “Ship it on the Frisco” is really not difficult.