replaced the alternator but to the best of my knowledge it's not supposed to be be a higher output than factory but then again that was around a year ago and that wasn't something I knew of or understood at the time.
Even if it is a bit higher capacity, that's OK.
The actual power output from an alternator or battery depends on the demand from the lights, motors and whatever else.
There's a few situation which can create excessive demand where a higher capacity alternator can lead to damage more quickly.
The most common one is charging a dead or low battery at fast idle or by driving. If the ammeter is showing 30 or 40 amps - that will become a problem soon. If its pegging the ammeter, the wiring will get damaged.