Ammeter bypass and aftermarket gauges.

You could totally remove the black wire from alternator to bulkhead. Run a direct charge wire with a fusible link in it

Make a Y splice attached to the OEM red/fusible link and feed all the interior/dash harness via two bulkhead connectors. Although I've seen plenty of smoked dash harnesses, especially the blue ignition wire, where the OEM link did nothing to stop damage.

Bypass the ammeter as it is not responsive any longer to the required current.

No cutting or chopping up the OEM stuff.

I know a guy that builds that stuff... :rolleyes: