this is IROC RSR at 1976 Sebrins piloted
by Me John Tunstall as I recal the RSR in front of me was Dyers We were both running in top 10 & would alternate our positions after 8 or 10 laps its a long race & we were both running very fast laps . This was a U.P.I. photo taken entering the long back strate . We would alternate tuck in behind each other [drafting} and blast down the mile strate at very close to 200 MPH
