Hi. The first question is what sort of power are you after and, more importantly, what is your budget!
If your dyno printout is correct then your 16VT is running the maximum power possible with a completely stock fuel system. So to make more power you'll need some modifications. What mods depends on the above.
BTW its not normally possible to fit a t28 to a 16vt because the manifold flanges are different. Do you have an aftermarket exhaust manifold, or does your turbo have a T3 flange? Do you know the spec of the turbo; trim, a/r, etc?