If the sending unit has a return line and the fuel pump does not have a return port, there is no harm in blocking the return line. If both the sending unit and the fuel pump have a return line, use it. If the fuel pump has a return line and the sending unit does not, the right way to do it is to install a different fuel pump or a different sending unit and line unless the fuel pump specifically says the return port can be blocked off.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching
