Stop in for a cup of coffee

You can run electronic ignition with single field or dual feed alternators...

It's the voltage regulator that determines if you need a single or dual field alternator... Electronic voltage regulator (later style) vs solid state (early style)...
Yup. At first the solid state versions of the pre 1970 regulator (one field brush grounded) were offered by mopar performance. Those don't look like the originals, but work the same. Now its prob rare to buy a parts store regulator that has the points no matter what it looks like.