If you going to buy a kit, i.e. Snow Performance, Devil's Own, Cool Mist, etc., and follow the directions. In front of the throttle plates is usually easier. But for big power, which you are making IMO, put a small nozzle pre-turbo and a larger in front of the throttle plates.
I've been using a Snow Performance kit that has worked flawlessly into it's 3rd summer. It can easily handle 15 gallons per hour and they say it will handle 20 on a single pump. I run both nozzle pre-throttle plate.