Build your heads. Look at any hybrid dyno chart and see why, it's like throwing a rock over a cliff.
At least new cams. Wrx cams will not support your turbo.
I used sti cams and modded them(get a machinist to plug 4 holes on end of intake cam)
I used cometic .051 to adjust compression of sti shortblock. ride5000 will be right behind me talking about "squish". I chose to have the right compression instead of right "squish" and you should too as long as you're running a bigger turbo.