Hey Paul.....I have great news for you. I really didn't understand what was going on but now I do. You do not need the "bumping circuit" for your application. In other words....the full 12 volts is NOT necessary to get the ignition to work and start properly as long as the other components are in good shape.
The "bumping circuit" was designed literally 50 years ago to help the ignition overcome poor starting conditions (usually cold weather, poor fuels and high compression) and/or was to offset natural degradation in the wiring and spark system. Unless you are running funny fuel or high compression or live on the Artic Circle...then try this...you'll like it, easy fix. This assumes you have the correct ign resistor as well, there are differences.
I can tell you today that you can tape this wire back and away you go. I have done this time and time again on many a car with a new mini. So, the good news is just do it and try it first! Put in on and listen to the music it makes and roll on! I should have just said it way back...
On the ignition side.....if you want to upgrade to a regular footprint full 12 volt system, look at a Pertronix solid state switch with their coil. This replaces the points and You then can eliminate the resistor and you do not need the wire anyway!
-Concept One Pulleys and Brackets
-Marketing Technologies Limited
-Northern/Southern Rodder Magazine's "Jack'Stands" technical column author/originator
[This message has been edited by HOTRODSRJ (edited 10-29-2002).]