To answer you voltage test question: yes.

As for not owning a dwell meter, you need one. Gap setting is nothing but a preliminary setting to allow the car to start. Does not mean it is correct, and setting gap certainly does not mean you are "done" setting up your points. Points are not properly set until you also set the dwell.

There are about 3 or 4 other things that are necessary to truly set up points correctly, even beyond gap & dwell. Spring tension should be checked, alignment should be checked, etc...

Nothing wrong with being a romantic. Just recognize that points setup is truly becoming a lost art...and it is indeed an art, not just a procedure in a service manual.

The just "install and gap" routine will often provide sub-par results and rapid wear.

One of the best explnations of the whole process I ever read is in this link, particularly the "setup" section. Read every word. 3 times: http://www.gofastforless.com/ignition/points.htm