Do I need a special socket to pull the stock plugs or will a regular 5/8 plug socket work? I'm putting a set of the one piece champions in before I have a problem...
Technically speaking I think the proper size to use is a 16mm but a 5/8" should be close enough. Be careful though because I have heard of people breaking them off while trying to replace them! I am going to change mine out but I am waiting until winter just in case I have to pull the heads...
Ford does have a special socket to remove the spark plugs--I know this because I just borrowed one from one of my ford techs to replace the plugs.
You will need a 9/16" spark plug socket to pull the factory plugs and a 5/8" spark plug socket to install the Champions.