Using OBD2 injectors, D15B dizzy rewired to work w/ OBD2.

It had been running, but poorly. Rough, sounded like it was missing. I tried to start it up this morning so I could troubleshoot some more, and it started, running rough as usual. It let out a real loud backfire, and died. After that, I couldn't get it to start again. Could not get spark, have swapped out ignitors on the dizzy, have triple checked all grounds (Thermo, tranny, and valve cover, right?) and still no spark.

I've taken off the cap and felt the coil w/ my finger, and did not get shocked when motor turned over. So I guess dizzy is getting no power for some reason.

Cliff notes:

Loud backfire, car dies, now no spark.

SOMEONE GIVE ME A LIST OF THINGS TO CHECK FOR, PLEASE!

 

Any help?