I do plan on installing an idiot light. My understanding is that the with wire from the alternator two pin connector should run to the idiot light and to the ignition switch. The red cable on the connector should be connected to the starter post, which is connected to the battery.
I am planning on running an electric fan and may draw more power than a stock. If I add the volt meter, it will be the one that directly replaces the ammeter in the gauge cluster. I see them on several vendor sites. I would guess that the alternator 10ga wire would still connect to the + pos volt meter post or should it be connected to the starter/battery.

I am OK with continuing using the ammeter but am worried that I may be overloading it. Is there any advantage to running a 50amp fusible link vs a 50amp fuse?