I did this in my GTX using an Aeromotive Stealth 340 pump installed in the stock fuel tank. This is a simple task if you can fabricate and weld; if not then it is an expensive task. Pump output depends on pressure. The higher the pressure (fuel injection) the less output. Using a carb (5-10 PSI) the pump is almost at free flow therefore it will pump more fuel. You can get flow rates for any pump via a google search. I am doing my other cars fuel system now in preparation for a 512 stroker. I am going to use Tanks Inc. For about $500 you can get a new fuel tank with a sump box installed and fuel pump (they use Welbro) modified to be easily installed in the tank. All of this can be had at Summit for less than what you can get direct from Tanks Inc. (at least for my application)