Dunno, what's your engine/tranny setup. If it's lighter duty like a 302 or a 300 then definitely no. The real question here is not HP, but torque. Without engine/tranny numbers I couldn't tell you either way though.
well, if it's a powerstroke with a stock dual mass flywheel, then i would go ahead and change it out now to a single mass flywheel and clutch. then your clutch will hold to about 300hp. that is about all the stockers can hold up to. if you want a clutch to hold 500hp call Dan Vallance at Valair clutch and he can set you up with a clutch for that.