It's more than the clutch's ability to hold a given horsepower/torque. The "stupid sliding weights", are pretty much useless, 'cept when you push in the clutch for a fast 5500 rpm shift and the weights keep the disc firmly pressed to the flywheel. Ask me how I know...
As far as strength goes, I've found a good OEM clutch (not parts store special) to have better clamp than CF's Dual Friction. I've had several run-ins with CF with my small and big block Chebbies.
For the OP, I run the aluminum SFI RAM flywheel on my KC Pond 482 with a single disc RAM 2600lb long style clutch and a sintered iron disc. I'm part of Rick's 600/600 club and have put 8000 miles on the setup with never a slip. Engagement it pretty smooth too. I also run drag radials all the time and have been know to lift a front tire or two
FWIW, it was the KC's clutch of choice when I bought the setup. I do think that if I was to do it now I'd go with one of Rick's dual disc setups. You just can't beat the grip, coupled with the s-m-o-o-t-h engagement. They're 2+ times the cost though.