I haven’t kept up with Nascar but remember when I was in high school in the mid to early 60s.
It was Ford vs Mopar. Daytona was the big one. I can remember when the 426 came out and Plymouth finished something like 1-2-3. All the Ford guys were devastated.
The Ford 427 SOHC was banned from Nascar. The Hemis wouldn’t have stood a chance against them.