stall is for setting at the traffic lite and initial acceleration--if you have a trans with decent ratios(not a 2 speed powerglide) you won't and probably shouldn't run a high rpm stall converter for street driven vehicles. If you are racing the car a high rpm stall lets the initial launch be more positive.

A more modern trans-4l60- with a lock up converter will be a better choice for a driven car and better milage--better performance for cruising, etc