in before it's closed, try searching and read what has already been written.
what do you need to know, 320rwkws is easy for a 25/30, fordged piston and rods, cams, injectors and the correct turbo and then keep winding in boost till you get what you want
or buy a rb26 a pair of -5s, poncams, 700cc injectors and a rb30 sump