fixed a lot of them with a kit from NAPA , rethread the hole and put in an insert, never had a problem after. I have seen some of those heads that only had 2 or 3 threads for the spark plug, so it isn't just installer error , and several that blew out with very low miles before anyone had tampered with them , and some that blew after someone replaced plugs. bottom line is its an easy fix for anyone that bends wrenches for a living, so no big deal. lots easier than putting rings in an oil burner chevy , or timing chain issues, or the aforementioned intakes.....they all have their issues people.
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Today's Featured Article - The Niagra View Mobile - Powered by a 1959 Ford Tractor - by Mark Massey. In 1959 the Niagara Frontier Transit Inc. of Buffalo, New York designed and built six Viewmobiles for the Niagara Frontier Sightseeing Inc. for use as a sightseeing ride at the Niagara Falls State Park, Niagara Falls, New York, powered by a 1959 Ford 611 Tractor.
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