I have a question in regards to the later style electrical system that uses an external shunt but still has an ammeter. So, I have a couple of different options here. Option #1 is buy a NOS ammeter gauge and run with that. Option #2 is to send off to get the ammeter converted to a voltmeter.

Now, thus far the current ammeter is working however it has been in the car for 37 years now. I'm going to be installing a solid state IVR (Instrument Voltage Regulator) and cleaning up the connections on the firewall side anyways. But, I figure it wouldn't hurt to ask here. I know 1976 A Bodies, F-Bodies, and M-Bodies used a shunt style setup as well. Thoughts?