ok, this is what you need to know. there IS a hidden bolt. it resides down below a hose that goes from the intake manny to a metal tube that runs along side the intake manny and ducks under right before the throttle body. the bolt is right underneath the tube right befor the tube goes under the manifold. this mother ****** held me up for a very long time, so I hope you don't have any trouble. other then this, there is about 7-10 vacume hoses and coolant hose to remove. bolts there 12 holding it to the the cylinder head, one for the fuel supply line, and two for the fuel pressure regualtor(not sure this has to come off, but I took it off any way.) and the "hidden bolt." besure to drain the cooland first. and you'll need new gaskets, and you are supposed to replace a coolant hose that runs right down the middle between the two banks of cylinders, it is about 6" long and has a small bend in it. its called the coolant by pass hose or something. I would also try to strip the manifold bare and totally clean it out if it looks black in there, it makes it run much better.