Torque converter question

Limited off the shelf converters for the 904 though, usually they are made to spec of the engine as johnnymac says, iv used a TCI 11'' breakaway on a street car, and it was good, but it was only ok on the strip.
depending what you want from your car and engine combo, and if its a daily driver, look at a TC with 1000 or so over stock like the Breakaway