First, quit changing parts out just 'cause. The ballast resistor and voltage regulator weren't your problem and screwing with them is just a waste of time and money.
Second, take a step back and start trying to diagnose your problem rather than guessing at them. Do you have a factory service manual? Download one here:
MyMopar - Mopar Forums & Information - Service Manuals
Now, lets take a look at what has happened... So... The car is not running now.. Correct? You've gone from running rough to not running.
It's time to start looking at what was done and if anything needs to be "undone". Please don't be insulted by this next couple questions, I have no idea what you can and can't do.
When you set the points, were they set so they open to .017" and then close completely as the distributor turns?
Have you had any of the spark plugs wires off or rotate the distributor? I ask that because of the angle of the vacuum advance toward the radiator. If you haven't touched them, disregard that for now and circle back after the car is running again.
Is the distributor cap seated all the way down on the distributor? Rotor in place correctly?
Those are the first things to check.
Since it was running, I doubt if it's a wiring or ignition switch problem but it's a quick check and let's eliminate them. Put a test light or digital multimeter on the plus side of the coil. Turn the ignition to "on". You should have voltage there. Now turn the engine over. Again, you should have voltage. That just tested the ballast resistor, ignition switch and associated wiring.
There's some places to start.... Let's see if you can get it to fire up again.