A proper fuel system should not just be a rubber fuel hose and pump. It’s essential for optimum performance, to set up a well thought out fuel delivery system.
From a quality tank, to proper fittings, connections, and lines, to regulator, pressure gauge, and finally to the carb or throttle body.
Different throttle bodies, fuel injectors, and carburetors, require differing fuel pressures. So the entire system, down to the fuel line diameter, should be set up to fit the individual application for optimum overall performance.