With the added boost you'll definitely see a gain but I would guess not the full 40/30. If I were you I'd send Jeff at RacerX an email and ask him for an estimate of what he thinks you'd gain with your mods. I've found him to be pretty helpful in my dealings with him.
Depending what he says you might find its not worth the money at this point. You could be better off putting the money into a turbo kit or ECU etc.
petmr2
Argh I just realised this will not work with my side mount intercooler.. especially since I ordered the racerx IC pipes...
Are you refering to the Side Feed or the Centre Feed? If your worried about moving the TB forward not making it work I'm sure RacerX could make a TB inlet to make it fit. The stock one is restrictive anyway so your better off without it!