@hellno and I have been partnering on a car that just went 8.57 on a full weight hellcat no nos on one of
@hellno 's transmissions. Car makes 1200 or 1300 hp without spray. He is going to spray it as well at some point to try and get into the 7s.
@zhc is running 7s on a built 8 speed.
Remember a built trans at that power level wont last you a life time. You are going to be at a power level that requires things to be refreshed.
Most importantly HAVE A GOOD TRANS TUNE.