? on torque converters

The stall TCI recomended (1900 - 2100) sounds like a stock HP set up or a tad higher. The 3000 stall sounds high to me, but would get you off the line in a hurry for sure.
Being it's a driver, 3000 sounds a bit much IMO. (But I'm a 4spd guy.)
If the converter is very effiecnt, the 3000 stall would not seem like the car has nothing at lower speeds.

You allready have 3.73 gears and a smallish tire. If it were me, I'd follow the TCI suggestion. Your gonna lay down some rubber with the 360 w/340 parts & Magnum heads. Torque will not be an issue.

I'll be going the same engine route later.