I have had the car for a little while now, and It came with all the "bolt on" upgrades already, so i decided to doa headswap. well after ordering Pi heads, and getting a PI intake manifold, i found somthing out today...... I have a PI intake manifold installed on my car!!! (plastic FORD PI crossover though) Looking closer, the area where the head gaskets, bolts for the valve covers, and everyhting invlolved in the PI head swap appears to be newer looking than other parts in the engine bay. Is there any way to visually determine if my heads are PI or NPI by the outside of the engine? I'd hate to drop $300 on labor and $500 on parts to put somthing i already have in LOL thanks a ton guys!