If you run through my Troubleshooting Procedure it will help diagnose the cause of no spark.
If you place a test lamp on the coils high input it must glow when the ign switch is on. Put it over on the coils low output (to distributor) terminal and it needs to be ON when points are open but OFF when they are closed. If it never goes off (should with points closed) the poinst arent providing a good ground.
My procedure tells how to do all this