If you have a stock engine i wouldn't use big turbos ( its not going to last you long).
I have GTSS'S in my 34, all stock low k's, unopened engine, just exhaust and power f/c, just a little laggier than stock turbos, if you believe dynos ( i don't, they all read different) she made 289rwkw @16 psi.
There is different spec R34 N1's..