no probs man... basically you have a 300rwkw turbo but no supporting mods, which means that the car wont be getting enough fuel. this will result in cylinder temps getting too high, and parts failing under load.
for a 300rwkw RB25 you should run a minimum of:
full standalone ECU (PFC, nistune, link, vipec, etc etc)
Z32 AFM
500cc injectors (however if you want to use e85 in the future think about getting 1000's
fuel pump (single intank you mentioned will be fine)
a good tuner
+ the other shit you already have...
i'd also look at getting a 1.5 way diff if I were you