KWI and WSRD have designed a fuel cap assembly for the HP freaks out there which replaces the OEM fuel cap and allows the use of very high flow single or dual fuel pumps with AN-6 outlet and return fittings.
This fuel cap can be used in a couple of ways
With a single OEM fuel pump and sending unit if you install an external fuel filter. You will simply remove the OEM fuel cap spring rods and install them into the KWI/WSRD fuel cap.
With custom dual pumps that you fabricate and install. You know what to do.