clutch choice for 408

Hey guys, , when I was using my 340 I was using a stock style pressure plate and and clutch. Now, I'm moving up to a 408 408 with between 450 and 500 horse, what clutch and and pressure plate can I use to hold the little extra horsepower? Can I use the stock style pressure plate and and a different clutch disk or is it better to just buy a new kit? If so, what kit should i be using? What clutch kit is cost effective but will still hold the horsepower? Thanks FABO.