I have no experience with Swamps but I dont think you can go wrong.
Many people like PIS.
I suggest their 160/30's if you want to stay stock fuel system and oil. Will be a solid 400HP rig.
If planning to get a fuel system and a bigger HPOP go with some 238/100's. Some stock systems in good shape can mostly support these injectors. Playing with about 500HP here. Can always be detuned if not ready for bigger fuel or oil yet.