IMHO, Think I would disagree on that... Even with a higher output rated alternator, the output current of alternator is never going to equal what the starter motor current requirement is, nor does the alternator produce output during cranking. If you still have an un-modified, non bypassed alt (ammeter) gauge, the wire gauge going to that gauge may need to be increased as it's in the path from alternator to battery thru bulkhead connector. The wire gauge of the alternators output, thru bulkhead and eventually back to battery should be sufficient to handle the cars maximum current requirements for lights, and whatever other 12 V devices are in the car. If you have modified the car by installing additional non factory items, then whatever the original alternator output wire gauge is, of a stock un-modified car, will likely need to be increased to deal with the additional current, unless the added additional loads are derived directly from the battery terminals. If you are adding additional electrical items directly to battery they should be always be properly fused for protection.
