how do you change spark plugs on 1999 Ford Expedition

trying to find out how to change spark plugs [from top or bottom.

Asked by for the 1999 Ford Expedition
from the top. they are by the fuel rail under the coils. very labor intensive job. it takes close to 3 hours in a shop with all the stuff you have to remove and get out of the way to access the plugs.
if you have never done this operation, i recommend letting a shop do this for you.