Welcome to Just Answer Chrysler my name is Mark.
If you are trying the access the water pipe that connects to the back of the water pump, then you'll need to remove the intake manifold so you can remove it.
Yes, the upper portion needs to come off as well as the lower intake manifold.
Yes, that piece will need to be removed as well. It will be bolted to each cylinder head, and some of the bolt holes are shown in the following pic.