CHOOSING THE RIGHT TORQUE CONVERTER

I have A 10" TCI 3500 and it will flash to 4000 rpm. Mind you i am making 516 tq at 2900 rpm. 3.73 gears and a 275/60/15 drag radial, car is 3330 with me in it.
It's a 100% street car, converter behaves like a stock converter until you lean on it, doesn't make extreme heat or slip.