I agree and my first Nats was just a couple years later! I was buying plenty of 69 Roadrunners in 89 and they were only 20 years old!!!!!! My first was was an F8 roller for $50 plus a free 361 short block!
Oh man, I bought a ton of 'old' Mopars and parted many that most today would consider fixer uppers! Makes me cringe to think about it today but back then, just didn't have the room to keep but a few at a time.