Can't start, no spark getting to plugs

I've had my car sitting since January, everything worked fine back then. Now, I can't get my car started. It almost wants to fire the first couple of cranks, but never actually does. After more cranking, there is no indication that it wants to even start. I'm getting good fuel, spark from the coil to the distributor, but no spark to my plug wires (I've tested this)--> This doesn't make sense since it almost fires, spark is somehow getting to the plugs initially. I've checked the ballast (it's fine)--even tried a new one, also a new cap and rotor--no difference. I have a pertronix electronic ignition (Ignitor) kit installed, it's worked great for years. I'm starting to think this may be the problem. I checked the connection from the wires that lead to the ballast, electricity is flowing end to end. Before I go out and buy a new kit, just wondering if there is anything else I need to look for. Thanks!

'68 Dodge Dart
273 2bbl