Help needed

the moroso switch is all you need if this is a safety rule. a oil pressure fed switch will only cut off the fuel pump if the motor loses oil pressure, or the engine cuts off. you could have a wreck where you are trapped in the car, with the motor still running, and a fuel line gets pinched enough to start leaking some fuel. at that point, the fuel pump will still run, because the motor is running the oil pump. unless I'm missing something, what I'm seeing is that you are going to an electric pump, and need to be able to have it shut off in case of an accident. the way this is done, is you run your battery cable to one side of the switch, and then make the long run to the front of the car with heavy battery cable, from the other leg. connect that side of the long cable to a Ford solenoid, or some other source that can be used as a means of pulling power for all the electrical components in the car, such as your fuel pump switch and or relay. now, the only way that the long battery cable gets power to the fuel pump, is if you have the master switch on. if you had an accident, and were trapped in the car, track officals could run to the back of the car, and cut the master cutoff switch off, thus killing power to the long cable that feeds the fuel pump.

everything on my cars gets its power fed to it at the front of the car. the fan, electric water pump, ignition, starter, headlights, and anything else electrical. tha way if you have an electrical fire, or similar emergency, you kill everything on the car with the flip of the mater switch.

sorry if I'm missing something, but I think that will get you legal. good luck.