@Tester: Sure, the old 302 was an interference engine. So were lots of Cadillacs, and I’ve seen a Chevy 350 bend valves when the cam sprocket blew banging along the freeway at 75mph. Currently most, if not all, Ford chain driven engines are interference engines. People gripe about timing belts, but talk to the guy with the V-6 Explorer that needs $4000 of cylinder heads because a timing chain cassette blew up.