[s13eater]

1, the det rods should be ok for around 370bhp.
2, 444cc injectors from the skyline are ok for about 380bhp / 400bhp on a skyline, as there are 6 of them.
3, i would go for an aftermarket ecu that gets rid of the afm, then if you want more power at a later date, then your not restricted.
4, i'd go for a bit bigger turbo as well.
if you have forged pistons and steel rods, then 300bhp will not be any problem, there's 500/600bhp det motors out there, as long as its built good and a good fuel map, then it will be fine.