810 a.m. is the K-State football channel in KC. It is owned by K-State and Oklahoma grad as well as having the strongest signal in the entire country. They have already advertised it and carry every K-State game. They also referred to Arrowhead as "bill snyder family stadium" for that game. I suspect the broadcast will be a tid bit biased however......
Before sunset, I can pick up 540 AM out of Fort Dodge in my car. I have listened to several weekend football/basketball broadcasts this way...parked the car in the driveway, cranked the stereo and did yard work or "cleaned" the garage. And it's a clear signal. I don't know if it will work at Arrowhead, but it would be worth a shot. Near sunset they have to cut signal strength, it fades quite quickly, however with a 2PM kick, it should work.