There are two port you'll plug....one on the upper intake where the pcv line originally ran to. If you're swapping intakes, you can just remove that port and install a pipe thread plug. They sell assortments of them at any local parts store. As for the part where the PCV Valve itself goes into, anything that will fit SNUG and TIGHT into there will do. There is a big rubber grommet there. I've see what looks like rubber bath tubber stoppers sold at autozone / advanced auto that are for plugging heater lines that would work great. You stick them in, and turn a nut which makes it expand and tighten up in the hole. I didn't have to plug mine b/c I'm now running a victor 5.0 intake and it doesn't have a port for PCV as its a race intake.
Its an easy thing to do. Just plug up what you take off with whatever fits tight