turbocharging with cast cranks and hyper pistons dont mix well. Youll need forged internals if your gonna get serious.
Also most turbo engines run a dished piston to lower compression as turbo charging will definetly increase the compression when active in boost mode. Dished pistons are also helpful to keep the combustion chamber a little cooler to help with detonation.
Oh did I mention that sodium filled valves are a good Idea so they dont seize in the head after you dog the turbo on the expressway.