We will give you both sides of the fuel pump debate and let you decide which way to go. We have Broncos here at WH some using frame mounted and some using in-tank pumps.

Frame-Mounted Fuel Pump

In the blue corner we have the frame-mounted pump.
PRO These are easy to install and easy to replace if the need ever arises. It is best to mount these pumps as close to the tank as possible.
CON Those in the red corner will contend that these pumps go out more frequently, they are louder and that they do not like to pull the gas out of the tank when they are run dry. Without the addition of a fuel accumulator you run the risk of sucking air in hard core off-road situations if you run the tank low on fuel.

In-Tank-Mounted Fuel Pump

Now in the red corner we have the fuel pump mounted in the tank. You will need a tank that is set up for this.
PRO The red corner claims that these are much more reliable than frame mounted units and fuel pick up is never a problem because the pump is right in the tank. The pumps run cooler because they are immersed in fuel.
CON The blue corner will say that it is a major pain to replace on the trail if necessary. You would have to drop the whole tank or have a cover made on the inside of the Bronco to allow access to the pump. The in-tank set up also costs considerably more.

We have heard from different Ford techs who are on both sides of this debate, so the choice is yours.