Did you test the resistance of just the meter leads and subtract that out? If not, then the readings may be high; ballast resistance is very low, in the same range as lead resistance, so you have to do that.
If you did compensate for the meter lead resistance, and 1.5 ohm is indeed the correct reading, then you have the wrong ballast. The stock Mopar single ballast should be 0.5-0.6 ohms cold for both points and electronic systems.
BTW the dual should be 0.6 ohms on one side and the other side would be around 5 ohms. You need to disconnect all the leads on one end of both resistor types to make sure you have valid readings, or just disconnect them all.
I would check out Stan White distributors and MSD distributors.
