ok on my performance quest i am now at air/fuel. summit has these bbk throttlebodys one is a 70mm for 200$ and the other is a 75mm for 215 what should i get? i already have the LMS maf kit and chip and the exhaust is going on next week, also should i get higher flow injecters it the same time? if so what kind? and water kind of power will i expect from them? tanx -Steve.