you would have to run a high performance fuel pump. you can click on my name and search my threads and see i basically asked the same thing to a certain extent. you have to have a bare minimum on the front tank of 35PSI, and the rear is just a tad bit lower. unless your just wanting to do away with them, its almost as cheap to just replace them to be honest. i was wanting to run a fuel cell and get rid of my tank all together is the only reason i am and will be running a " in-line "
EDIT> here ya go.
http://www.ford-trucks.com/forums/89...ggestions.html