I started at the end of this and was scrolling up...was thinking, "yep, them's some interesting dirt track cars."
Then it was "holy balls, they do that much bumping on asphalt?"
Props. That seems like fun. I've always wanted to build a cheap racecar to compete in one of the low-end classes. Maybe just 4cyl near-stockers. Ideally some old POS with a Chevy V8 ('cause it's faster but still cheap as shit).