i wouldnt be wasting to much money on the head, all you need to make that power is drop in cams, upgraded springs, and cam gears for fine tunning.
a GT35 turbo or equivalent would be all you need.
CP Pistons 9.0:1
argo pistons will be fine check with engine builder for specs.
you should also keep in mind the costs of block & crank prep work. around that $1500.
before you start sending any blocks away have a clutch pressure plate, flywheel and the harmonic balancer sent to the machine shop with the block & crank to be balanced all together.
i get my machine shop to supply my with the correct bearing to suit.