I am currently in the process of building up a turbo a15 for my ute and I dont see your 180kw as out of the question at all. I am using a stock crank with the best quality bearings I could buy, stock piston with an enlarged bowl to reduce comp ratio and a fully balanced bottom end, I have an ex race big ported and valved gx head, zx10r quad throttle bodies and a megasquirt injection setup and I should be seeing 200hp without too much trouble if the tune is right. with your forged internals and a few more goodies than mine you should be able to squeeze a few more ponies than mine will have. good luck and I will keep an eye on progress