RADIATOR OVERFLOW
No, it's not recirculating. It's just an overflow. I didn't want the car puking on the ground on hot days. And yes, that's a Champion radiator as well. I went this route initially and it's what is in the car now. It works very well, the temp needle never moves after the thermostat opens up. But I decided I wanted to go full sleeper mode so I shelled out the astronomical bucks to get the original re-cored. It will be going back in when I build the engine over the winter.