I believe MountainAir05 is referring to changing the spark plugs. The COP's are easy to change. You have to be careful when changing plugs on this engine.
Up till about 2001 or 2002, the V-10 aluminum heads only had 3 threads holding each spark plug in place. These 3 threads can be stripped if spark plug torque
procedure isn't followed. Some V-10 owner's have had spark plug(s) blow out of the heads because of thread damage, over or under torgues, using wrong type of spark plugs,etc. Lots of discussions on the Ford Truck site: http://www.ford-trucks.com/forums/695263-spark-plug-confusion.html. I did mine and it wasn't hard with some good info and tools. Should you decide to change the plugs, do some reading first.
Good Luck.
