I left the Idaho/60 station at 12:05pm, all by my lonesome. Had a very nice drive. East to Globe, South to Winkleman, North to Superior, and then Mesa Mike brought his trailer to take me home. A few miles South of Superior, I heard a pop/bang and then a nasty-clattering sound that increased with RPMs. Still had excellent
oil pressure and no visual issues. Limped into Superior where I called buddy Mike. I parked at the exact same place he'd parked several years ago when I picked him up with my trailer, so he knew just where to look for me. I'll rip into it tomorrow or Monday. Thinking its valve train. Hope so.