How to test fuel pump? How to attach pressure gauge?

To 67 Dart273 post #4: No I mean the opposite. I am annoyed that I can't find the fittings to test the pump. It is wasteful to just change pumps. Yet it is easier to just change the pump than to run around looking at auto parts stores that are not going to have the fitting I want anyway.

To Pishta post #8: That is the pressure gauge I have.
What issues are you having? Why do you need to change the pump. With pump pressure I am more concerned about too much pressure than not enough.