Pick the Right Plug For Power
Most Gen III GM V-8 and some Ford engines use tapered-seat plugs with an in-between 0.0708-inch thread reach. If you use slightly longer 0.750-inch thread-reach plugs, a portion of the threads will protrude into the chambers and cause all kinds of grief and possible pre-ignition problems. This is why the right spark-plug application is so important.
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