What are your goals with the car? What are your future plans? Keeping it N/A, or possibly adding a bottle/turbo down the road? I'm guessing with the high CR, it's either a bottle or N/A for you. Figure ~$750 for pistons, ~$1500 for headwork, $600 for LSD, ~$350 for clutch, ~$400 for gaskets/hardware, and $600 for tuning(PRP). That's $4200 right there, but could always be done for less.
Mark