Jim Clark and Graham Hill were the bad asses of the bad themselves in F1 with limited stints in Indy Cars.
The rear engine Lotus cars they piloted revolutionized Open Wheel
Racing
. My father and I used to go to the Indy 500 when I was young back in the 70's. I've been to Daytona, Talladaga , Charlotte Motor Spwy , Bristol, Gateway and Watkins Glen .