1st Gen Camaro Battery Relocation

[TANKMASTERJ]

I'm glad I found this write up since I'm in the process of relocating my battery on 67 Camaro to the trunk. I have Powermaster 140 amp alternator and was reading on their site about the size of the charging wire. Here is a chart with the wire size they recommend. The length of the wire from the alternator to the battery will be 18 - 20' long. I was thinking a 4 ga. charging wire would be plenty, but they are suggesting a 2 ga. Able I reading this correctly? 2 ga. seems pretty big for a charging wire.

Just food for thought I have bulkhead fittings at my firewall. Both hot and ground pass through on its on one. That wayy 2 gauge runs from trunk batteries to those bulkheads. But alternator only has to go from itself to those fittings on firewall. I used #4 for the alternator and ran a separate hot and ground. Other things up front also pick up power there such as starter main cable, fan controller, and anything else up there needing a constant hot