Back a few years ago, on 28 August 1966, I attended my first ever USAC sprint car race. USAC sprint cars racing for 100 laps at Oswego Speedway, New York on the fast 5/8th's asphalt.
JMO - Of all the USAC sprint car races I have seen in my life, this was one of the greatest field of open wheel drivers I have ever watched race.
USAC sprint cars at Oswego Speedway, NY on 28 August 1966 - drivers racing this day:

Mario Andretti
Don Branson
Gordy Johncock
Johnny Rutherford
Bobby Unser
Roger McCluskey
Greg Weld
Wib Spalding
Mickey Shaw
Bruce Jacobi
Dee Jones
Sam Sessions
Bob Smith
Al Smith
John Tenney
Gary Congdon
Tom York
Earl Halaquist
Larry Dickson
Chuck Taylor
Billy Foster
Dave Lundy
Al Loquasto
Bobby Black
Chuck Allen
Ralph Ligouri
Norm Brown
Bob Pratt
Chuck Booth
Fast time: Don Branson in the #6 Leader Card Offy at 20.52
Consy top 5:
1. Tom York

2. Al Smith
3. Chuck Taylor
4. Wib Spalding
5. Billy Foster
100 lap feature top 5:
1. Mario Andretti

2. Don Branson
3. Roger McCluskey
4. Norm Brown
5. Sam Sessions
Have a good day...see you at the races
Rich - Arnold, Missouri