Torque Converter ID

The 764 designates that it will fit a 727. I'm going to guess that the HS7 means high stall for that particular core, there is no way of telling if the stator is modified short of opening it. As far as the other numbers, I don't know as every manufacturer has their own codes, I was hoping for something familiar. If it has been modified, I would think it would be pro rated at approximately 2300-2500 stall in a relatively mild street application. Hope this helps you out a little.