I believe the opti-spark was on it's way. Too much experience with these cars, definitely foul spark distribution especially on launch. When you swap, go with an upgraded unit like an Accel or MSD Billet, and not OEM-replacement, not even Summit's replacement which is basically OEM with improved Cap & Rotor.
Oh, i didnt see what you wrote about the opti. id love so see more vids once you get the stall.
All those mods and only 8.6 ? I ran 8.755 @ 80.25 MPH on a STOCK except for exhaust 97 z28
8.6 on street tires,..........It's a work in progress,......