2x Garrett GT2860R 707160-5 (VERY VERY similar to GT2530's but a fair bit cheaper. A much better value turbo so U can spend the saved money elsewhere.) - buy within australia
2x Bosch Z32 AFM - buy within australia
2x Apexi pod filter for Z32 AFM - buy from Japan
6x Nismo 600cc injectors - buy from Japan
Nismo fuel pump - buy from Japan
HKS S-Type oil cooler kit - buy from Japan
EXTERNAL OIL RETURN AT THE VERY LEAST FOR OIL CONTROL! Is worth paying the extra for a Nismo sump baffle as well though. Ur engine will more than likely die very shortly after unless U do these mods. Yes, the engine will have to come out.
That stuff together should make a reliable 330-ish rwkw. With a pair of Tomei poncam type b's (260 in and ex) and a fuel pressure reg, will be good for 380-ish rwkw. Stock manifolds are fine. Just make sure U port out the holes that meet the turbos out to the full size. The 2x bosch Z32's and a pair of apexi pods to bolt on will cost about the same as a pair of smaller nismo afm's so the Z32's are obviously the way to go.