stock gage output wire 67 barracuda engine harness

Here is the chart I was thinking of. Notice that 50A up to 4 ft is right on the dividing line to 8GA. This "4 ft" is "round trip" meaning you must also consider the GROUND return

http://delcoremy.com/Documents/Troubleshooting/Delco-Remy-Charging-Cable-Flyer-8-14.aspx