They are under 8 coils, which are sticking straight up,to the left and right of the intake manifold.
Go here... http://www.craigcentral.com/durango/plugs47.aspfor a good write up of a plug change for these engines.

 

Hey thanks amigo! for a minute i thought this would have to be a real mechanics job

 

 

i dont know about 4.7s but on the 5.9 and 5.2 those bosch platniums SUCK! I fouled mine within a week, and started having problems with the idle.

Swtiched them out with autolite 3923's and it runs fine. Also it was abouit 40$ cheaper then those damn platniums.