Here's how I did mine. In your case I'd run a bosch 044 pump, -6an (or -8an if you want)from tank to carb and -8an return line. The pump is an inexpensive, yet proven, performer that will easily supply the fuel you need.
Link to pump:
http://m.ebay.com/itm/Genuine-Bosch...-Warranty-0580254044-/261908865765?nav=SEARCH