Fuel line sizing is an important consideration. Imagine aggressively drinking ice tea with a cocktail straw. Remember, fuel line sizing is only as large as its smallest point. If you have 5/16 inch anywhere in the system, you have a 5/16-inch fuel line. Electric fuel pumps do a great job; however, they're unnecessary for the average street Mustang. If you run an electric fuel pump, install an impact kill switch to disable the fuel pump in a collision.