centerforce clutch

I've been looking at a centerforce II clutch for my del Sol. I also want to get an Exedy 8 or 9 lb flywheel. when I was reading reviews on the centerforce clutch I read one from a someone with a civic EX that said they had to machine their flywheel because the pressure plate was so much larger than OEM. does anyone know anything that might help me out here because I dont want to have to machine a new Exedy flywheel.