Ammeter to Voltmeter...who does it?

OT, but since we're talking about it, there is guy on the carburator forum who used that coil when going the other way with his Mustang. He got rid of the fuel injection and needed a simple ignition system. I pestered him to post the details, which he did.
Thread here if your interested: More on E-core coils, TFI and Duraspark.

I'm retired, so I'm always interested in reading articles/posts that will increase my knowledge, provided the info is accurate. Sometimes I feel like a monkey doing math in Greek, when I read technical articles (especially when it comes to electrical...I can read a schematic, thanks to my Dad, but he never delved into theory with me); other times I'm just a lost Easter egg.