Starting Shift Point

Hang on now. Do you have a manual valve body and did that test in high gear? That's the only way to be accurate, otherwise you're putting too much leverage on the converter in low gear and you'll get an inaccurate measurement.
So, I understand they make runs on a chassis dyno not in first gear, but if the purpose of adjusting stall is to get the engine into the power band as quickly as possible from low gear. Why? Once you have made the 1-2 shift, the goal of shifting is keeping the engine in the power band? Wouldn’t second gear be a better compromise? Be careful testing stall, it is hard on things.