Was thinking of installing a dual alternator for my new project. My questions are:

i. My current stock alternator is rated at 60 amps. If I were to upgrade to a bigger alternator, would there be a risk of frying the electrical with a higher current alternator? Or can I just replace it without upgrading my battery to bigger ones?

ii. If I were to install 2 alternator, what do I have to do? Can I just wired 2 alternators together or do I have to add external regulators or relay?

Since its very hard to find bigger size of alternator in my place, I was planning to install dual 90 or 100 amps to my car and also upgrade the big 3. Anyone has more info in upgrading alternators?