I want to add a turbo to my 2002. Can I use a 320i injection system without modifications running approx 7-8 psi. If so should I use pre or post 79 320i injection. I can fab a turbo header fairly easily and I want to use a T3 from a Mustang svo with a intercooler from a saab. I am currently using 9:1 compression pistons. Should I use flat topped pistons. Comments and advice are appreciated. Thanks Cameron A.