[DanEC]

If I understand your question, you are asking why you need electronic ignition and how difficult is it to go to something else (apparently points and condenser).

On the second question, you need to run a ballast resistor with points per the ERA wiring diagram. Not knowing what changes ERA makes to the wiring to accommodate an electronic unit, you probably would be best contacting Doug there and talk to him.

On the first question, the big advantage of electronic ignition is supposed to be the lack of routine maintenance. If you are comfortable with points, gapping them/setting dwell, and understand you probably will need to check them once a year - then this may not be a big deal for you. Personally, I started out setting up a dual point distributor for my Mopar in about 1968 and there isn't much that can happen to one that I can't deal with in a couple of minutes. I prefer dealing with mechanical stuff where I can observe it's operation and adjust easily - than mysterious electronic boxes that defy easy diagnosis. But, I'm kind of in the minority anymore and a lot of people have gotten really comfortable with electronics. So, it's kind of a personal decision only you can make.