Overcharging - alternator suggestions?

If you actually have stuff drawing that amount of power, I can tell you without looking that you need a MASSIVE rework of your electrical system. Larger cables to parts of it, and what are you using for the charge wire from the alternator? And yeh, maybe a larger alternator, but you ain't gonna drive all that with one belt, probably.

And you also better invest in some test equipment so you can evaluate loads.