Torque Converter weight location

I'm currently gathering all the needed components to balance the rotating assembly for the Duster. The question I have is about the torque converter. I have a '73 340 that is externally balanced. I have a TCI Break Away converter (PN 141200). My question is, is this a neutral balance or an external balanced converter? If it is externally balanced, where would the weight be located? There is a square weight welded to the outside circumfrence of the pump side of the converter. The weight is not very big (1/4" thick, a little over 1" long), which leads me to believe it is not the weight for an external balance. Point me in the right direction folks.