It was perfect for 5 years and 30k miles and then I sent it to precision for a rebuild because clutches were worn and it's been shit since. I had some tranny issues that may have permanently hurt it. Transbrake was messed up and cooked it so had it rebuilt again and now it surges and sometimes after a rock solid shift to second there another engagement almost like another gear but it's just the convertor engaging.. Like 0-30 regular no boost acceleration it surges like letting out a clutch in a manual transmission. Surges from stop light take off and then surges after hitting 2nd. To be clear the shifts are firm and hard, it just after the shift or initial take off it surges and then engages.
if thats a billet 69mm then you are moving some air with your combo.even at 28psi you should be mid to high 9 power level with traction.a multi disk vig has been in the 8s on red a car but inmo a ptc non lock 9 inch would give you less problems at that level of power.if you want to stay lock up and try something new dave husek may have something for you.you would have to contact him for specifics.