On an EFI system the pressures generated are far higher than on a carbureted set up, in the 50 psi range. Hence, the use of the correct lines is even more important on an EFI system because the higher fuel pressure makes any rupture in the system far more dangerous. This is why factory EFI systems include an inertia switch to shut off the electric fuel pump in the event of a collision, something that should be included on any EFI conversion. EFI fuel pumps such as this Professional Products Power Flow EFI Blue Fuel Pump will deliver fuel at a rate of 58-gallons (220-liters) per hour. The innovative extruded aluminum heat sink helps keep the fuel cool. The pump is PN 70151 and the price $105. The late-model preformed lines, with their special connectors, are no good for a custom EFI installation on a classic Ford. To create an EFI fuel system that's up to the pressure requirements, a top-quality flexible line (or custom-formed hard line) and AN fittings can be used.