Starters draw down the battery voltage during cranking to about 8 volts. The points ignition systems were designed to function on about 8 volts, so that during cranking you had full spark. That is why Mopar vehicles are famous for their ballast resistor. The run position of the ignition switch supplies voltage to the one end of the ballast, while the other end supplies the 8 volts to the coil + terminal. The start terminal has a wire that supplies cranking battery voltage to the coil + terminal.
Supplying the coil with running battery voltage would burn the points quickly.
Mopar coils have two primary terminals, 1 + and 1 - that goes to the distributor.
Some use a different coil (Ford) that had a ballast resistor built in and 3 primary terminals, 1 + batt, 1 - to the distributor and 1 start that gets volts from the start terminal on the ignition switch or from the starter.
Do you have 8 volts at your coil while cranking? Is there continuity in the wire from the ignition switch start terminal to the coil? Strange it worked for 2 weeks and then pooped the bed.