Reply to "Distributor with only one green wire?"

The new distributor with the green wire appears to have points and condenser. Your old one has a Pertronix or similar electronic ignition module.

If you change back to points, the green wire goes to the NEGATIVE terminal on the coil, and switches the ground side of the coil to charge/discharge the coil. The POSITIVE terminal of the coil is unused with points, and has 12V at all times when the ignition is on(this powers the Pertronix module if used as well as gives the coil power). 

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