Which Fuel Pump?

Your stock pump and 5/16 line are enough. If you want to upgrade, then do a 3/8 line from tank/fuel sender all the way up to the carb. If your car has a return line, use it In conjunction with the regulator and the high flow pump.

That set up will take you to some high hp levels In The street.
You can reference the big block fuel line sizes vs. there HP ratings and see the 5/16 line goes far.