Ammeter Battery overcharge

Hi all. Ammeter is showing "high voltage" and is "jumpy". Im in the middle of performing tests. I have multimeter.
Currently running 273 Mopar elec ignition. Orange box. All stock wiring other than for elec ign.
Stock coil, stock gauges EXCEPT aftermarket coolant temp and oil psi. Dash ones are unhooked. I haven't done the MAD electrical yet but its in the future.
I picked up a NEW voltage regulator today. Standard # VR125. (See pic)
But the connections are different than my current one?? I gave description of 73 dart for VR as I figgered that would give me electronic ign VR?? But connections are definitely different.
Im checking a few things now and will provide more info/results if need be.

Pics attached
Thanks
Steve

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