New product, much the same as M14X-BBSH just for 370Z instead. Can use that listing as a starting point

Website listing notes:
- Suits RZ34 and Z34 steel subframes
- Bolt in product, no welding required
- Made from billet aluminium 6061-T6
- Suits all GK diffs (billet and cast)
- Drilling guide supplied for ease of install
- DOES NOT suit pathfinder diff which requires M16 bolt

ASM guide attached
Printable drilling guides attached

Let me know if anything further is required.