I had the stage II and loved it....unless you're putting down some serious mods, I think the DF would be too much for a regular 2.2 even with some nitrous.
I ran a centerforce "stock replacement" clutch in my 99 Z28... I didn't end up going to a dual-friction until I was making ~440 flywheel horsepower, even then I found it too be a very agressive, grabby clutch...