Ammeter Battery overcharge

Thanks for the link ValiantOne. In that thread it reads like in order to switch I would need a different style alternator? ?
Here's pics of current alternator thats approx 2 years old. 2 connectors, green one (looks like wires cracked but its not thats heatshrink)
The other connector has violet and black wires.
I would need a 2 field alt correct?

Thanks