CHOOSING THE RIGHT TORQUE CONVERTER

Yea just had it rebuilt 2 years ago and has about 3,000 or less miles on it and was built to handle 450 HP. And did real well running 2 10 lb bottles of nitrous at around 400 HP but never off the start always 2nd 3rd and over drive. But I still wounder if you can get a 904 to handle 450 HP.
DANG... was hoping to spend more of your money. Lol