If you're looking to bolt up both the calipers and rotors, here's your answer:
- Front calipers bolt up after you drill out the spindle mounting holes to 14mm (350Z bolts are larger). Then you'll need to find some new hardware to bolt up the caliper since the bolts are longer (or use a spacer).- Rear calipers won't bolt up.... different bolt hole caliper spacing. There's a couple of guys who have made a bracket to adapt the rears however.
If you're just looking to use 350Z rotors on 300ZX calipers, use this kit:
http://cgi.ebay.com/ebaymotors...ZWDVW
-Cosmo