Those engines are an automotive high watermark. I remember being at one of the Chrysler Performance Clinics in the sixties and after the clinic had concluded there were a number of guys who hung around to ask yet more questions.
I wish I could remember the question that was asked but I definitely remember the answer that was given. I think the question had to do with what Chrysler's answer to the SOHC was going to be and the answer came back, "... The biggest favor Ford ever did for us was when they discontinued production on that engine. ..."
Just look at Alan Sorkey's (Full Throttle Al) engine bay-
Aside from being way cool it is an absolute visual knockout!
Ed