i can see that i would change from your high comp 11.5:1 pistons to 9:1 pistons, get some gsr cam, s100 to s300, and get a a/c compatible turbo kit with a turbo around the 57 trim size. And some injectors around 750cc did it for me. You won't have any problems making 400whp... thats my take on you situation. And as for prices, you just need to shop around to find you best prices!!