G'day mate, thats a tuff one, the engine has probably done around 15-20 thou now and the odometer shows 105thou but obviously being a different clutch, gearbox and dif the kms will be lower than that.
As for the boost im not entirely sure, while getting it tuned we got up to about 220rwkw and as I have no need for a car that fast as a daily I had it dropped to the 170rwkw so im unsure of the psi