RT,
I notice from your other post about tank removal that you already had an electric fuel pump fitted. The type and installation of your new pump will probably be dependent on what you have now. First of all, is it fitted at the front or rear? If at the rear you'll need a push pump, for example a facet posi flow or facet cube pump. If it's at the front chances are you already have a pull pump, most likely SU. One of my cars had an SU under the bonnet, fed from the reserve line (the original main line was plugged and the reserve tap by passed), all cobbled together with every type of hose, including what looked like garden hose! I got rid of the su and put a 4psi facet cube at the rear, with braid hose from tank to pump, pump to 8mm copper, straight up to the engine bay and into the carbs via an inline filter and braided hoses. I blocked the original main line from the tank and fed the pump from the reserve, but retained the original return line. This setup was only run for about 30miles with the original carbs before switching to a weber but it seemed to work fine. One of my other cars has a facet posi flow at the rear, fed from the reserve outlet of the tank, and connected to the original reserve line. It is used purely as a backup and the car must be switched to reserve before it is switched on. The amount of modification/bodging carried out on your system and the current pump location will have a big impact on how you should approach this.
Regards,
Dave