Man I'm old.
I was there helping my dad who tagged wheels with Steve Lotshaw in the heat race. At which point he did a big time header into the wall. His knees swelled-up to the point he could hardly walk, and my mom had to drive us home that night. Never went without knee guards again!
No back-up cars then. Dad ripped what was left of the car apart later in the week, and took it over to Don Vogler for many needed repairs. I think we were out for about 3 weeks..at least??
Ahhh the memories!