GTO Racer

Hello guys i am new here and in the tuning scene. I could use any and all knowledge and assitance from the experienced people on here. I am buying a 94 Mitsubishi GTO vr4. It seems to have been altered since the steering wheel is on the left instead of right. Will that affect me altering the parts in anyway or engine swapping? Im completely new to this and my goal is to get this girl to at least 500- 600HP. I would like to know the most effective way to achieve this without wasting money on unnecessary parts. Keep in mind i dont want this car to blow up on its first race so if i need to upgrade parts to ensure bigger turbos etc can be handled then inform me please. I have about 10-12k to invest into it of course if i can spend less thats better. Parts list would be appreciated. Looking forward to your help guys P.S. Im also open to ideas of complete engine swap to bigger engines for more horsepower if it can fit. Any and all suggestions would be appreciated.