Take the problem in pieces.
You visually have sparking at the points, good. Clean spark is good. A spark that is ragged, seems to explode out of the points, bad condenser.
Now test the spark at the distributor end of the coil wire.
If there is no spark there, replace the coil wire or test with a piece of sold wire for spark at the coil tower. Make your sure your test has a GOOD ground.
No spark from the coil is a bad coil.
Spark to the center of the dist. cap and nothing to the plugs - rotor, cap or spark plug wires.
Electricity follows rules. If your coil creates a spark, it has to go somewhere.
