Fuel Transfer Pump....

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In process of starting my L18 swap and currently have dual tanks. I know I read somewhere in one of Larrys threads about how the factory transfer pumps wont work for size reasons so was thinking. I plow with this truck so having that extra tank would be nice although it doesnt work now. My idea was as follows:

Get a fuel transfer pump and have the passenger side as the aux tank as it is now. Cap off or just leave in the fuel sending unit and drill a hole to fit a tube down into tank leaving 1/4" from bottom. Weld that to top with it sticking out enough to weld or compression fit a fitting on for the transfer pump. Mount pump on frame or wherever and have it go to main tank. Main tank will have another inlet or I can tap into existing fuel filler hose. Run a switch in cab with some kind of time delay switch as to not leave it on and either overfill or burn up. Also would like to have a manual override for the off position in case it fill up faster than the delay.

Not sure if any of this would work thats why Im wanting some input.