Trying to break one is easy...keeping one that doesn't break is harder.
What you after a reliable eleven second car?
Are you confident with the parts you have now?
The easiest thing is to slap on a larger set of Turbo's for power gain ,but this will result in major Engine damage.
These are the following things you need to look at with a RB26 REBUILD
FOR OIL- PUMP.COOLER,BAFFLE.
FOR WATER- PUMP, FLUSH.
FOR PETROL- PUMP,REGULATOR,INJECTORS.
FOR ELECTRONICS- COMPUTER,COILS,PLUGS,BOOST CONTROL.
FOR AIR- FILTER,INTER-COOLER,DUMPS, EXHAUST,TURBO'S.
MOTOR- PISTONS,CRANK,CAMS,RODS,BOLTS,SPRINGS,SHIMS etc,etc,etc,
The power level you are chasing although quite mild makes hardly much difference in the mods.you
Choose...all need to be looked at and upgraded.
After this you have not even looked suspension, tyres, brakes or any cosmetic mods. yet..lol.
Then there is labour which will cost to fit all the above and tune your car.
So take your time and set a budget every year for mods.and supporting mods.
On the other hand:
GT2680-5 Turbo's,N1 Petrol Pump-Regulator,700CC Injectors ,Power-fc ,Tomie/ Poncams-adjustable timing gears, boost controller will see you with a safe tune at 320AWKW's and in the 11's.
This will cost you approx.$8K parts and labour.
But will only suggest the above if you have new oil/water pump, timing belt/bolts renewed.
This is another $2K.
This is not a motor re-build...but I am like the others...if it ain't broken...why fix it?
Hope I have been of some help