[rotorwrench]

If a person is going to install a conventional ignition switch, the system really should be modified to connect the distributor directly to the coil and install the power wire in the switch circuit like all the later cars from the model B on. The model A is one of the few cars that switched the breaker side of the ignition circuit through the armored cable of the electro-lock switch.

On the original model A vehicles, the coil was connected to power all the time but it was only hot when the breaker circuit was turned on.