I have a triton timesert kit to fix and or prevent from blowing spark plugs. Best kit on the market an is a ford approve repair.I timeserted all 8 of my cylinders so I don't need it anymore. Also this kit allows you to do the repair with the heads on the motor! It cost $460 new. I took perfect care of it an all bores an tap an dies are in great shape. Asking $350 but open to offers and trades! Pics to come Danny