I have no spark

What your looking at with the 8 points is the pickup coil there will be two wires coming out of that going into the ignition module . this 4 pin module hooks into the condenser module and then there's wires that go out of the distributor. The fail points on this system are all easy fixes . The wires coming out of the pickup coil will often break causing you to lose your spark . replacing the pickup coil requires removing the distributor and tearing it down to reinstall the new pickup. they can also be repaired buy simple soldering the wires back onto the pickup. if the wires are fine then the next step would be to replace the 4 pin module and condenser module. Its a good idea to replace both at the same time as the one you don't change will fail immediately after the new one kicks in. Hope this helps