Stall speed is NOT generic. Depends upon how much power is in front of it. More power, higher stall speed. Which is why a normal Slant Six 225 converter might "stall" at 1500rpm behind the 225, but when it's behind a 383/335, would be closer to 2500rpm, for example.
AND, due to the heat build-up when "under power", don't forget to upgrade the trans cooler, too!
There's also "flash stall" where the engine temporarily "flashes" above the normal stall speed, on the staring line.
"Loosening" the torque converter can tend to take away the "tightness" which Chrysler TF torque converters were known for. Which also made them more fun and reassuring to drive, to me.
Rather than "big cam w/stall converter", it might be better to have a torque cam that will rpm (with heads and exhaust that will support that "rpm" part) with a normal 2000rpm stall converter, maybe even 2500rpm, will make a much better/enjoyable driving experience, to me.
Just some thoughts,
CBODY67