This will be fun to watch:
914

I'd love to have it, but the devil is in the detail. Need to take a closer look at the rest of the car.

This looks like it could be dangerous. I would let him know about this. Thanks!

Clark

It's a quick release aircraft style pin.. push button on the other side that lets the little ball move inward to it can be removed.... I think this car is all about changing things quickly for track conditions... Probably a better way to do this but I'm sure they never lost a pin...

Aircraft pin. Would make adj the bar rate quick and simple.

"PIP pins". I use them on RV/trailer solar panel mounts for easy release to pivot up toward the sun.

https://www.mcmaster.com/pip-pins/

Kinda-neat car but holy heck that wing is gawdy. I immediately thought "autocross/hillclimb" when it saw me.