This sounds like a dog chasing its tail. You might want to back up and start again by telling everyone what you are doing with the heads. What kind of vehicle are you putting it in, the tranny, the induction system,etc.
Are you racing, pulling a boat, four wheeling, drag racing, what?
Your end result goal determines where you start. Then, these guys can be more precise with their answers. Now, let's try again, OK?