Enzo truly poked the bear when he screwed Henry.
After the 1966 sweep of Lemans by the GT-40s and the 1967 domination by the GT-40 Mk IV (a 100% Ford-built car), Gulf Oil took over and still won the 1968 Lemans by a hair over Porsche. I believe that is when the displacement limit became 5 liters and the old 427 was ruled out.
Did you know there was a rematch of the famous Lemans sweep of the 1966 Lemans 50 years later? This time they were a few classes down but it was still a rematch;
https://performance.ford.com/series/...le-mans--.html
Great auto racing history for sure!