Yeah...what forphorty said about the converter is SPOT ON. especially with a mild build. you really need to be careful not to get too much converter. Heck, for most street builds, the factory high stall is plenty.
Converter stall on the said 383 is a question of mine. What would it be? Would it depend on the car it came out of?
What would the stall difference be between a regular passenger car and a hi stall in a road runner. (For example)