So here's the Google Maps link to the tourist court above. You can follow the road to the left and find the cemetery. And zoom out to the north to find the old RR roadbed.
I'm not 100% certain, but my guess is that the old Route 66 followed County Road B on that map. If you pan to the right (east) I think Route 66 moved closer to the railroad. It was somewhere between Jericho and McClean, where Route 66 climbed the caprock, where the Jericho Gap was, if I guess correctly.
https://www.google.com/maps/@35.1693686,-100.9082899,103m/data=!3m1!1e3And a pretty good description of the area and the Route 66 alignment.
http://www.theroute-66.com/jericho.htmlKeep in mind that there is often more than one old alignment of Route 66. For instance, it probably did run down County Road B for a while, but was switched to the current I-40 location when it was paved.