4.6l 3V spark plug removal
Ford has a TSB dated 4-1-08, it's 08-7-6 that gives instructions on how to remove the plugs so they do not break upon removal. It also has instructions on what tools to use and how to remove them if they do break. It covers 4.6l 3V, 5.4l 3V and 6.8l 3V engines.