The concerns voiced above regarding the VLSD are because Nissan typically uses different diff side splines on the CV shafts for VLSD units. On the 350Z when swapping in a CLSD (from Cusco, Nismo, KAAZ, etc.) you have to change the diff side of the CV shaft if your 350Z has the OEM VLSD.
FYI... the 350Z diff is short nosed R200.