You pull the fuel pump from the top. There is a black cover plate that covers another cover plate that covers the top of the fuel pump assembly. (say that 3 times fast) You will see the top of the fuel pump assembly and all the lines going to it. You will have to disconnect the fuel lines going to the assembly, and undo the 6 (I think) nuts that hold it to the gas tank studs. Depending on how rusty it is, you might be in for a really shitty day. I recommend lots of Liquid Wrench, and some flare wrenches for the fuel line.