Fresh 904 start-up

"A low converter would have a higher stall than it should"?!? NO. There's a lot of bad info out there. If there isn't enough fluid to fill the converter, then there surely won't be enough fluid to apply clutches or bands. Run it about 1/2" above full. Just remove the neutral safety switch to drain out any excess. And set the kickdown so it's at max when the carb is at max.