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DennisB, WiseAutoTools.com ©Looking for the best repair for your blown out spark plug? One that can be done without removing the cylinder head? You've come to the right place. In just a few minutes we'll give you the rundown on the best solutions for Ford spark plug thread repairs, even the largest oversize repairs. All of our repairs use the original spark plug when completed.Every day, we receive calls from customers looking for a reliable solution for spark plug holes that have failed previou …