electrical tape no really. i set the height and wrap the threads in electrical tape. i should have taken a pic of my driverside coil. its been taped up since winter. unwrapped it to work on it when i put the insert. was perfect. i dont use antiseize cause all it does is make dirt and grit stick to it. the fk body in the picture was the passenger side. it was taped but since the insert was blown all the oil leaked out which peeled the tape off.
found a pic.