Ported heads on a stock turbo truck I wouldn't think would get you much of anything being its forced induction.
you would probably be surprised, getting more flow will add power and dropping boost while maintaining flow will add power because the air will be cooler having not been compressed as much and there will be less wasted energy driving the turbine wheel to create bigger boost.
basically what I'm saying is even if the flow stays the same because the turbo is incapable of any more flow ( which I doubt) there will be a gain.:joker: