George, I added a drawing to the picture above. Both wires connected to the coil are connected to the bottom (right and left) of the resistor. The (-) side is blue and the 'Bat' side appears to be green with a red stripe, but very hard to tell. All wires in that area have the same patina. The large black wire coming out of the moldex connector is about the same size as the lead going to the distributor, so I assume that what it is. Perhaps that blue wire adjacent to it feeds the tach. The red wire going to the moldex connector is the thinest in the group. Back to my original question, suggestions on what to use to trigger the relay? Just come right off the 'bat' side of the coil? The car is a pre-L '72. Again, thanks for your patience..
John
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