Did the 04 wrx engine have any problems .

Reason for the question is im about to start rebuild a low Km engine so i can install ino a track car . looking for around 400hp atw

best options for getting this power.

Turbo:
internals:
2.2 or 2.5:
cams:
crank:
etc:
Heads/port :

Im looking at doing it right the firsts time, but not have to spend a million dollars to get the power im after . Most of the work ill do except for the machining.