Richard 5.0

i need to know what fuel pump and regulator to run... i have a tank with the fuel insert.. i want to run 1/2 inch line all the wat up and 3/8 back. but i dont know what fuel pump to run and regulator. i only have a singl 650 carb on it and i want to run that for now but switch it back to efi but i dont want to have to buy another regulator so any ideas? i dont know to much about this stuff. or do i even need to run a regulator with efi and what pump for a carb.