Need help with available power??

[Stuxnet]

I have a 2000 dodge caravan that I've been slowly turning into a (nice) car. and I recently upgraded the alternator to a 130amp because the original was a 70amp piece of garbage. I want to wire up some interior lights and also some extra charging ports for the back seats. but i'm not sure how much power I have left to draw from the alternator. I have a pioneer head unit, with a 10amp fuse (so I'm assuming it won't draw anymore then 10amps) and a infinity reference 611a with 2 30amp fuses. I don't have any head light dimming to speak of. but I'm not sure how close I am to the amps max output when I'm cranking the sound, which I do frequently. the car is a base model, meaning, manual windows, manual seats, manual mirrors, no power locks, no alarm, not even abs or traction control. there is very little to speak of electrically in the car. I figure, I probably have like 30-40 free amps before maxing out the alt? but I wanted a second opinion.

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