Coolant leaking out of my radiator cap and/or overflow

Hello, everyone. After parking me 1970 dart with a 360 magnum, I noticed a trail of liquid leading up to where I had parked it. Upon further investigation, I found it to be antifreeze. There was a decent puddle where I had parked, left the car running while I looked for my garage opener, and a trail to where I had parked it, and a small puddle under the front right part of the radiator. I inspected the overflow and it was still half full of fluid like it always has been. The radiator, however, had a trail of dried liquid running down from the side of the radiator cap. It seemed as if this stopped after I turned the car off. I just installed a PCV valve, which it did not have at all before. I don’t know if that means anything. The car did not say hit was overheating. It has actually been running very cool. That’s according the the painless wiring harness the previous owner installed. I had ran it fairly hard today. Any thoughts would be greatly appreciated. Thanks everyone