I am buying a 2000 Ford Explorer four-wheel-drive 5 L vehicle that is running eventually want to do a rebuild on the bottom end and I go with the serpentine system not sure about fuel injected or carbureted The problem I have is I have an H O A that's going to give me a hard time about having a vehicle so I need to do a quick motor pull and junk the rest. Wondering what wires or computers I might need just in case I go fuel injected or what other items I might need