You are describing the plugs in the 4.7L engine and not the Hemi that GP has. On the Hemi, all the plugs are on the top, side-by-side. In fact, there is a single coil pack per cylinder that has 2 boots coming out for the 2 plugs per cylinder. When I was changing my plugs, it was difficult to pull the coil packs off of 2 of the cylinders. On both of those, each coil pack left 1 boot in the cylinder head. It was a royal PITA to get them out! Make sure to use dielectric grease on the boots when reinstalling!
BTW, I did my plugs at 30,000 and put in Autolite Iridiums. With conservative driving, I can get 19 - 21 mpg on the highway with gently rolling terrain.