NASCAR technology for the street sounds counterintuitive, but in reality the realm of ultimate pushrod race engines holds the secret to rejuvenating one of the best head designs ever created for the small-block Ford: the Cleveland. That's because prior to the release of Ford Racing's magnificent clean-sheet FR9 race engine in 2009, Ford's NASCAR program had overt muscle car roots. For the three decades preceding the FR9, the engines powering every Blue Oval racer were essentially 351 Windsor blocks topped with 351 Cleveland-derived heads.
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