Fusible link guage?

First, go to local alternator shop, get charging fixed; field grounded, or bad regulator. Start engine, after 2 minutes, lay on your back, stick hand up, and grab the ammeter; try not to cut your arm/hand while yanking it off that hot sucker. Bypass it.

The alt guy should have fusible links; it's just not a smaller gauge wire. It's special.