I just found a deal online local to me for a SVO 4.6 intake manifold for $300. The guy currently has it on a new edge GT so a PI motor. Did these come matched to PI heads or will it need to be ported? I keep seeing conflicting information, some sites say they were only for the npi or SVO heads. others say they were also made for PI heads? The guy who is selling it said he is unsure as he bought the car this way and hasn't taken it off yet.