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Would a larger guage be a better idea?

yes but unless you upgraded everything I'd think there would be a smaller gauge somewhere in the circuit which would still limit flow.I'd say you'd be better off cleaning EVERY connection & concentrate on why your main feed went out and possibly run Nacho's parallel bulkhead bypass (it's in the archives) and there's always the 8ga direct cable addition from the batt to the alt (w a 12ga fusible link)to consider. do you have stereos/amps or any similar additions? www.mymopar has wiring diagrams that may have the gauge listed for you on them.

live every 24 hour block of time like it's your last day on earth