So you just want a outright power engine? Fair enough bang a bigger turbo on there.

Want a more responsive, more revvy engine, and more power for less boost and less stress on your engine then get a ported head

Not to mention your gt3071 is the best part of a grand or more,

For a grand in headwork, head gasket, Top end rebuild you will make your engine 100%

That in my books is better than another 40 bhp or what ever it makes