I have used two different convertors on a torqueflite using a brake, and two different glide convertors with a brake. All have had aluminum stators. I had one stator failure that was an infant mortality (broke on the third pass)in the first convertor I used with a brake and a 727, it was a defect and was replaced free by Coan. I have not had a problem with a stator since that issue in 1993. When I went to a brake I was told the "J" convertor was too weak, not because the stator was aluminum though. Most everyone I know racing are using aluminum stators.