No Spark

Are you sure it's .320 ohms or .3K ohms, big difference. The resistance varies on these, somewhere between 200 and 400 ohms. If it's actually .3 something ohms, that's a fraction of one ohm. If it's .320K that is 320 ohms and is OK

Make sure the box is grounded. Disconnect everything from the coil such as tach and radio condenser. Make SURE the box is grounded.