I would stick with the KB, there know for great products and awesome customer service. You can order any pully size you want it doesn't have to be 6 or 9, a lot of guys on here will tell you not to go over 8psi until you do some internal work. As for pinging, 95 octane should be plenty for just about as far as you want to go with the motor. I've heard of people running 16psi with 93 octane. Brakes I can't help you with, maybe meatball or somebody will chime in. Good luck with the car.