See Roy Rogers #24 Silver Spider, #25 Trades Lead, #26 Jerkline Feud, #27 Mustang Mountain, and #28 Apache Blood.
The art may vary a bit since several of them worked on the same story (also by R W Phillips)
Al McKimson was a pen name for several artists. First the brothers Chuck and Tom McKimson. Others were Pete Alvarado, John Ushler, Randy Steffen, Andrew Bensen, Hi Mankin, Mike Arens, Alex Toth.
Art identification by Steinar Ã…dland December 2010.