To all those who were helpful about my question, I thank you. As to "FIRST monkey around" I can relate that I have extensive experience with automobiles, to include a complete tear down and rebuild of my '65 Mustang, including rewiring the entire car. However, the Packard is my first foray into a 6 volt electrical system. My uncle did leave his sketches and description of the wiring runs for the electrical system, but none showed which post was grounded. Fortunately, my shortsightedness did not cost me. After reversing the battery, and repolarizing the generator, the Hemi my uncle purchased and installed in 1952 roared to life. From everything that I can tell, all is fine. The ammeter now shows charge when the engine is running, all the gauges work and yes, even the radio sings its AM static. Oh, by the way, yes it is a Darrin convertible. All my uncle ever called it was "The Darrin". I believe it's a Super Eight, but I am unsure. Is there any way to find out definatively? Michael