Came across this article from 2016; backstory of the 427 engine that powered the GT’s in ‘66 and ‘66. A long but worthy read. Enjoy
‘Dyno Heard Round The World’ Tells Backstory of Mark II 427 Ford Engines
When three Ford GT40s led the overall class race at the 24 Hours of Le Mans, they recorded one of the most epic moments in international motorsports.
performance.ford.com