No, 370Z, aka Z34s front brake caliper mounting ears are wider. That's why there are even mounting brackets for fitting 370Z brakes on 350Z.
See this link for some info:
Akebono Nissan 300ZX F&R 14 Inch Big Brake Kit w/ Stoptech Rotors, SS Lines, and Motul Fluid - Nissan performance parts
and they are only worthwhile if they are the "Sport" brakes.