Pertronix.. Put a good set of points in it and use them to trigger a Vertex Z-6 CD box...
The vacuum advance is the first thing I remove, then I set the initial to what the engine likes, not what some generic manual that has to work for millions of cars says.. The 427 in my shop truck (69 el Camino) likes 22 initial 14 mechanical all in by 2400...
I don't like my idle controlled by the engine vacuum, I like it to be steady and stable..
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