Any clutch that will manage to hold that kind of HP and torque will eventually shred the teeth off the gears in that transmission. I suggest an adjustable unit that you can drop the base pressure down at the track when whooping it. A sintered iron disc with a Long style PP would get the job done but will probably be close to $2500-3000 with a good steel can. I know of a Tim Hyatt clutch that would probably work but will need a new disc installed to make it work with your combo. She may even still have the Lakewood can as well. I can send her a text if you are interested.

Gus