Alternator wire size

[clemsonteg]

I've been reading a lot the last few days about upgrading the stock alternator in my 70 c10 to a 12si. The only question I have is about upgrading the wire size of the wire which goes to the battery terminal on the alternator. Should this be upgraded? I see that Mad Electrical uses an 8 gauge wire in their kit. Should the wire size only be increased from the alternator to the junction within the harness or should it be increased from the alternator to the junction and from the junction across the core support to the battery?