I having this exact same problem. There's a great page I found yesterday on fixkick specific to spark. It's not written that clearly but it's in depth. Below is a quote from that page relating to the cam position sensor in the dizzy. If you've got power at the coil and the voltage triggers from the CPS as per below then it should be pretty easy to trouble shoot which wire between the ignitor and ECU isn't connected right.
Quote:
CMP TESTS (in the base of the "Dizzy", DTC code 42 fails) 1991-1998
DMM = Digital Multimeter. DSO = Digital Storage Oscillisope or just Scope it.
Do not delay with tools , set your DMM to 20 volt range connect the minus lead to the metal of the engine. (or use DSO)
Connect the Red test lead of the DMM to the distributor white wire side connector (91-98 ,8v or 16v) (do not remove the connector ,just back probe it)
Key on, and crank the motor, the DMM needle will swing from 0v to 5v and back to 0volts for each fining of each cylinder.
The CMP generates a nice 5vdc square wave as seen on a DSO, see photo of DSO below.
Link to the full "no spark" diagnosis page -
http://www.fixkick.com/IGN_timing/no-spark.html