Nine inch clutch sources ?

I'm going through the same thing. There is a 10 inch scalloped clutch and pressure plate that will bolt up to the flywheel. I had HR clutches rebuild mine to about the same level, 300 HP, but have not installed it yet. McLeod makes a very nice 10 inch disc but have'nt installed it either. Right now I have a standard 10 inch clutch and pressure plate and i'ts starting to slip at 6k powershifts, after only 5k highway miles.