Bill mentioned the wastegate, which would have plumbing to the actuator to read the boost signal, i.e. when to leak exhaust. Google "turbo wastegate plumbing" and look at the pics. Plenty of stuff showed up for me. Additional plumbing would be the oil lines to the turbo where the diagram shows "oil inlet" and "oil outlet". Nothing special there, just run a couple of lines to an adapter where the oil filter used to be, or research your engine to see if there are other places to use. If you're using a dry sump system you can plumb to that. Beyond that I don't think there's anything else. I'm not an expert though so someone else may have something to add. Take it a system at a time instead of trying to get the whole picture at once, then put it all together. I too have done a lot of research for a twin turbo C-7 I'm planning, good luck