stall speed help

Depends on your goals. How much street and how much strip? The most efficient/fastest stall for the track would be matching the stall speed to peak torque of the engine.

However, with those 3:23's even a very high quality converter that is nice and efficient will have moderate slippage cruising around town at 35-40mph with a converter that's made to stall at 3800rpm.

If it's more street than strip, but you still want a good launch I'd aim for 2800-3200 stall depending on torque. A nice converter will still have really good manors on the street if youre cruising closer to its "stall speed"
Joe