engine wire harness 1970 dodge dart slant six

I had my air cleaner off to the side on the valve cover while I was listening to my slant six engine running. Then my air cleaner slide to the side and touch the alternator and one of the wires. I just saw an arch and then I heard and saw smoke at the bulkhead by the firewall. I shut the engine off right away. I just said fusable link because that is what I read on one of the wires.