Make sure to do an aluminum insert if you go the insert route. There have been some lightning guys with steel inserts who have had detonation problems from it being a hot spot and it ate away all around the insert on the head. Foxlake said the same thing regarding the steel inserts causing hot spots in the cylinder on a FI engine. It might be fine NA but nitrous or any boost and I would definitely stay away from steel inserts.

Also with the lock n stitch kit there is no chance of the insert coming out like some of the timeserts have during a plug change. Nvr_Spds on SVTP works at lock n stitch and at one point was talking about renting a kit out so might be worth a shot to contact him.

install directions http://fulltorque.com/pdf/Ford%20Tri...structions.pdf