I used the electric fuel pump to pump the last of it out through the filter drain after I drove it to as near empty as I dared by jumping power to it or cycling the key. The tank probably weight less than 30 pounds. It will cost you around $35 to do the intank and prepump filter mods and I highly recommend doing it, well worth the effort in my opinion. Take a look at the pics I took when I did it to mine.
alabamafrog/Powerstroke Fuel system - Photobucket - Video and Image Hosting
These are the same pics but lower quality but they have comments explaining them on each one.
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