On ZZPerformance's website, they have both water underdrive pulleys and alternator underdrive pulleys.

Is it harmful for either of these? What about both at the same time?

The alternator pulley comes in 14% and 10% underdrive. Would 14% be too much with a water underdrive pulley? Would my battery lose its charge?

I know its a bunch of small questions, but it really would help me out. Thank you guys, yet again.

I think I might be hesitant to use the pulleys on a daily driver car (like what happens if you get stuck in traffic?)...if it were my second car and liked to go dragging or autocrossing, then I might go for it...they power gains are small but together with other mods they cam make a difference at the track...but I'm not certain how feasible they would be for daily street use.

I had smaller underdrive pulley on my Grand National. I never really noticed the difference in the accessories. My A/C was from the late 80's so it sucked no matter what. As for everything else, I never had an issue. I drove that car as an everyday driver. That was back when gas didn't cost your first born. If I still had that car, it would NOT be my everyday driver anymore!

I would say for a daily driver not worth it. For track use then yes. If you want to free up some hp I would look into an electric water pump.