66 cuda electrical

^^ What Red said. If you are not getting voltage out to the ignition / coil, it could be one or more corroded connections in the bulkhead connector. Turn the key to "run" and check out at the IGN terminal of the regulator and or ballast resistor to see if you have any power.

To expand on what Red said, the neutral safety switch and starter relay work together in these cars, and the starter relay then sends power to the starter solenoid.

You have a starter relay looks something like this:



The great big stud is a battery junction point and is ALSO one of the relay contacts

The second relay contact is the "square" termninal and goes to the starter solenoid

The two push on connections are the coil. One of them gets power "in start" comes from the ignition switch, through the bulkhead terminal and to one of the "push on" terminals.

The remaining terminal must be grounded through the neutral safety switch in park or neutral.

First thing to try is hold the key to start while wiggling the shifter through park and neutral.

If that does not work do as Red suggested. Identify the wire coming off one of the terminals, goes down over the transmission to the neutral switch. Ground that relay terminal, twist the key and see if it cranks.