what is your budget?
just stripping my zetec turbo, the costs will spiral if you don't budget and plan ahead big time.
what management are you going for?
what gearbox are you using, as this will determine clutch.
300bhp is quite a lot, i'm not sure what mine has done power wise, but just short of 2BAR through a gt30 must be heading towards 400bhp and is too much for anything other than a strip or trackdays.