Just bought a set of NGK plugs at the auto store. They are pre-gapped at .054. The AUTOLITE plugs (FORD) are also pre-gapped at .054. The underhood sticker says .054-.056. The Haynes manual says, however to use .044??!! Stick with the underhood specs and the pre-gapped settings. If u are using a high energy ignition and wire set then I would gap them a bit wider as well.