Thge recomended location for an electric fuel pump is near the gas tank. I used one on my VW powdered sand rail with a pair of Weber 40DCNF carbs and is ran flawlessly. This was an offroad toy and not a street machine. The distance from the tank (an aluminum beer keg) to the engine was about two feet. I also had a pressure regulator set to about 3psi. The use of one on a Mustang is not necessary unless you are racing however. The stock (original) mechanical one on my 66 "K" has worked without any problems and that engine sucks gas.
Jim