Which ignition do you have? The chrysler one or MSD etc??
If chrysler:
1. unplug the coil wire from the distributor, set near a good ground (1/4" or so).
2. unplug the distributor 2 wire plug.
3. turn the ignition to the on position
3. using the harness end of the distributor plug, scratch the exposed terminal to a good ground, you should see a spark from the coil wire to ground.
Let us know what happens