1. Should be a direct bolt on fit (34 gtr use diff size bolt, 32/33 are the same)
2. The caliper, disk and i would also put on ADR braided lines
3. Dont see why not as that is how they came from factorie.
4. I would also change the brake fluid and if it were me the master cylnder to a gtr as it is larger or inspect your one and if need be change the seals.