The torque converter is neutral balance with that small weight. Then the large weight is added for the external balanced engine.
What I have done in the past was carefully cut the large external balance weight off with a cut of wheel. Cut down into those 2 spot welds being careful not to cut into the converter housing, The area will get weak and you will be able to pry the weight back and forth until it comes off. Once you have the weight removed smooth the weld area with a flap wheel . You now have a neutral balance converter.