To make sure we get the right info out there:
I just bought Z34 axles and wheel bearing hubs from Z1 Motorsports, under their 350Z / G35 Rear Axle and Wheel Bearing Upgrade Kit.
The 4-bolt pattern on the hub-bearing assembly does not match S13 rear knuckles.
I'm going to try and salvage this by getting the knuckles re-drilled and re-enforced. The Z34 axles are beefier, as well as the hub bearing assembly.
To answer Silv1401 original question: 350Z/370Z rear hubs will not fit S13/S14 knuckles 4-bolt pattern.
20221105_152636 by
Jaime Vargas, on Flickr
2022-11-05 15_46_40-7tbYumyhwh8kx_84FNSGXgNA7gq_wee_xUQgjjdiFltb7SQjCV gQIDetH0u9Oxegu3Ff5UH2TRaSa1aR by
Jaime Vargas, on Flickr
2022-11-05 15_43_55-LBNfUtD-Bo5AA4V8Gl2Tgxbhb0zRD1O1JR3YPhRIg2lq3mhQ_rhow1-6tzx5kZOlZ_I3RhwPfsWwD7Kw by
Jaime Vargas, on Flickr
2022-11-05 15_22_05-350Z-G35-Rear-Wheel-Bearing-Axle-Upgrade-Kit-370Z-G37-wm2.jpg (2500?1200) by
Jaime Vargas, on Flickr