Killing the alternator doesn't make sense if you think about. It would just spin slower, it's output is what it is, it's nothing more then brushes making current.

They could drain the battery at low rpm but it shouldn't kill the alternator, I have a volt meter and plan to also install a new deep cycle battery it should be fine.

In any case anyone have an answer to the questions I asked?
In addition, do the 6th gens use left hand threads for the pulleys or are they normal threads?