Measure across the + to - 1973 Dodge FSM shows two coils. one with primary reistance of 1.6 - 1.79 ohms and the other 1.41 to 1.55 ohms The compensating ballast reistor should be .5 - .6 ohms at 70-80*F 1969 is the same. So no change there.
The voltage at the coil depends on conditions, that's why its best to measure the voltage going to the resistor.