Hi guys,
can someone tell me what gauge wire is used on the stock FD harness from the main fuse box to the alternator?

am using the FD alternator in my FB so want to make sure i do this appropriately. called a few audio shops and they have either 4 or 8 gauge wire as 6 gauge (which i was planning on using) is not common so they do not have it in stock. i'll be using 4 gauge from the battery to the starter and thought 4 gauge would be overkill from the fuse box to the alternator.

thanks.