Honestly you are missing about 99.8% of the shit you would ideally need for a high hp setup. It would take me an hour to clean up that horror show excuse for a list.
Man, we've all been in your situation, just getting into cars. There is a lot of shit you just need to read and learn. I don't know much about the 3000's but is the car already turbo? If not, I'd look into a turbo motor swap. If so, just start off with a decent turbo-back exhaust setup and an intake.
What you NEED to find is a 3000gt dedicated forum... They will no doubt have recommended modification lists based upon the specific car and model. You should also read up on what other people are doing to their cars and what kind of power they are making with those modifications.
Another word of advice... If you jump up saying "i am looking to make 800hp" when 99% of the local import scene will never touch anything close to that, you are asking to be flamed... As you were.
