Slant six 1920 stall

Thought it was around 5btdc but I have been doing so much messing around trying to iron out all the other odd crap, Ill have to check it again tomorrow.
Surely hate the thought a a bad torque converter, how do you even go about checking that? Is there something else that might mimic that overloading of it?
Really hate the thought of tearing into the carb again and doing the pressure testing. Just had it torn apart yesterday. But seem to be getting some good progress now. Frigging cars!
Thanks for the suggestions.