Also, do not run straight battery power to coil for very long. Yes, it will run, but the resistor in the normal wiring is to keep from frying your coil.
The start circuit uses full battery voltage to coil, then switches to power through the ballast resistor in run (drops voltage to 8 volts or so).
There are ignition mods that do allow full voltage to coil, as more modern ICMs are internally regulated. I have this setup using a GM ICM from a Chevy V-8.
418 miles on 19 gallons of gas. Can't beat the BBD !