the porting isn't that crazy at all. when you say "mani" are you referring to the intake manifold? If so I am running a crazy custom intake made by Nate squid that I bought off Creature Graham. I have some suspicion this thing is causing me problems. The other thing that seems fishy to me is the rubber coupler that connects the carb to intake, it just doesn't seem that tight to me on the carb side, although when I spray carb cleaner on there I get nothing. The hose clamp is tightened all the way down on that fucker.