Troy pretty much said most of it. I have run a header in my Prophecy Wwith an S.T.2300 trying to get it to run good. But you still have to pull fuel from about 18' back of the engine. Even with good muffler pressure I could still starve it in negative manuvers like at the top of an outside loop because the tank was about 3 inches higher then the carb, Ok in most attitudes except negative hard pushes. Finally put a perry pump and carb on it. Should have gotten a pumped engine to begin with. Header tanks are crucial to keeping air bubbles out of the system. The jet guys use them a lot because of this and tank location and multiple tank setups.