My Motorcraft SP-534 Iridium plugs were delivered from O'Reilys last night and I checked the gap today and they look spot on. Didn't have to touch them. Yesterday I also picked up a tube of "dielectric grease" and a tube of anti seize lubricant for the threads and a small torque wrench. My spark plug sockets are 13/16. Guess that shows my age. Should be able to get it done next week.