The ECU would be my 1st choice. Take the lead off of the coil negative terminal & w key on eng off take a jumper wire w 2 alligator clips & ground the coil negative terminal(not the wire you removed but the terminal on the coil that you removed the wire from) to ground, make & break it like you are doing morse code & see if you get a spark out of the coil to dist wire held 1/4" from a valve cover. If it sparks I would check that the ECU has a good ground & if so I would suspect the ECU as the culprit. If you now do have spark I'd take a spare dist & plug it in & twirl the shaft(also w key on eng off) & see if the coil wire 1/4" from ground has sparks, if so dist pickup is bad or reluctor gap is too large. Stay in touch get it running & enjoy the day. EDIT Check & see if your ballast has continuity & if the ballast and ecu have fire when the key is in "start".