Dan, here is my thought.  If the plugs are not firing then the plugs should be wet or at least show signs of fuel.  Smell them, you can tell if fuel is present.  I would check the boost pump and make sure you are getting “prime” fuel before you start cranking.  You didn’t say it started with a big blast of black smoke so I’m assuming it is not flooded.  You may be depending only on the engine driven pump for fuel.

Craig Berland