Since putting the Konis on, I’ve had three events with the car: 2 at National Trail and 1 at Roos Farm. The car performed well in all of those events, landing me two first place finishes and one second place finish (beat by Chris Hastings who was codriving my car). I did find, however, that the temps were getting out of hand in a pretty big way.
Because I just wanted it fixed, I changed a lot of things at once so I’m not sure what the actual fix wound up being. I know that putting in the 180-degree thermostat wasn’t the cure, but once I also flushed the system, put a new radiator in, wired up both cooling fans, reinstalled the factory overflow bottle, replaced the upper and lower hoses, installed a new cap, and filled the system with fresh coolant everything runs perfectly now.