I had the convertor looked into Dave Schwinn of Atlantic Coast Converters said that I had messed up some of the fin angles in the converters turbine and that had caused me to keep burning up the trans. I have since then sacraficed and gotten the th400 with hipster brake and the original 8 inch converter to put back into the car. He is fixing the 9 inch like 10 inch buick stated in his reply 3000-3400 on motor and 4400 on nitrous. I hop that it works out right for me so what I am going to do is take my time and make a few passes and then when he gets the converter done I will then make the change back to the 9 inch deal but he swear that the 8 inch will perform but is borderline for the application. He runs the super stock class and runs 6.32 with a 455 pontiac motor.