1973 318 - daily driver for years - now won’t start

Agree! Back when I was 16 my 69 Road Runner just quit. I was setting in a parking lot talking to some friends. Spark and fuel. No more diagnosis. I got another 383 and swapped it out. I bet it was just a timing chain. Yep. Diagnose the problem instead of just throwing parts at it. I know better now.