It's been a while since I've made any improvements on my truck and I'm getting the bug to work on it again. I'm tired of the lights dimming every time RPMs drop to an idle so I'm thinking of replacing the generator with an alternator and I'd like to avoid burning up the wiring harness.

The trucks a 1953 3100, but the electrical has been converted to 12V negative ground. It still has the original gauge wiring so the wire running from the generator to the voltage regulator (and ultimately to the battery) is 10 gauge. So far the wiring has handled the higher voltage without any problems. But the new alternator is rated at 75 amps. So, my question is can the 10 gauge wire handle the combined higher voltage and amperage or will I have to go to a larger diameter wire?