Originally Posted by cmonson
Coil packed plugs are even easier to change (no wires to deal with). Cheaper as well, as most of the time the coil packs last forever (knock on wood) and you don't have to replace wires as part of a tuneup.
the coil packs and plugs on the 4.7 are a nightmare to replace. especially on the rear passenger side. they might be considered "cheaper" if you buy the generic packs at autozone or where ever, but i think they are about $40-$50/each if you get a genuine mopar coil pack. multiple that by 8, and thats quite a bit more than any set of premium wires ive ever bought.
regardless, if you are swapping out plugs/packs, be very careful pulling the coil packs out. when i replaced mine at 115k (and im not sure if they had ever been done before that), they were seized in the cavities pretty badly. i ended up accidentally cracking the bottom part that surrounds the spark plug on several of them. this process was even more tedious on the rear passenger side.