65 Dart 273 Commando Ballast Resistor

A couple of comments.
- post #7 & 9 have incorrect info.
- measuring very low resistances [ less than a couple of ohms ] will give misleading results with a std DVM because they are not very accurate at low ohm readings. I have a special 'low ohm' DVM that is specifically designed to measure low resistance & sub 1 ohm resistances.
- using measured coil resistance etc to select the bal res resistance does not work because in operation the system is not operating 'statically'.
- the numbers quoted in my Motors Manual for 1973 Chry V8 engines is as follows: ign current draw, engine idling 1.9 amps, coil pri res 1.4-1.5 ohms, bal res 0.5-0.6 ohm.
You will find if using a non OEM low resistance coil and original resistance ballast will result in an overheated coil. This shows up after extended use on warm days and high RPM use. It will leave you on the side of the road.