4 pin ECU I am assuming? Might sound off the wall but going by the descrip and not being able to visual check it, if gapping the reluctor to .008" w a brass feeler gauge is not it me I'd cut the wire to the coil positive primary and cut the wire to the "point" of the ECU pentastar connector and jump 12V directly to both of them from the batt positive post then crank it from the starter relay. The ECU/coil/pickup are good and the ECU is grounded as it "runs" and the pickup gap may need reducing & that only leaves something in the wiring grounded/open when in ign2 "crank" unless we're still missing something and we very well may be but this is what I'd try