RE: Perry pump?
Jay, I agree with John & David. Without knowing anything about your engine or tank set-up, I'd say install the Perry Pump, adjust it, then your low end and high end needles on your carb (in that order). With the pump, you do not have to be concerned with the tank location. Just make sure you tap into the crankcase of your engine, close off the pressure nozzle on your muffler, and use the pressure directly from the crankcase to power the pump. Also, make sure your tank vent is left open.
And above all remember; "Experience is a hard a hard teacher. She always gives the test first, and the lesson some time later!"
Phillip