Im doing the PI complete engine swap (literally right now, i have grease allover my hands haha) and Im lookin at my new motor....the intake manifold is the completely plastic model without the metal crossover pipe. On my non PI motor (the one in the car) I replaced the cracked manifold with one from the dealer which had the metal crossover tube a few years back. Should I use my old manifold that has the metal crossover tube, or is it not PI,....how can I tell???....I dont want to lose any power