Alternator amp rating.

I would say the max amp alternator you can safely run, without any mods or updates, is exactly what it came with originally.
Replace the ammeter with a voltage gauge, and do the MAD bypass, and you might be good with the 75amp. Personally I would upgrade the entire charging circuit, but then again, I have a good reason for feeling that way..'69 wiring with a 65amp alternator

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