What I would do - replace plugs and under gap them slightly (0.85 to 0.9mm/.033 - .035in) Use NGK's or Bosch. Replace coil with an OEM style transformer type coil with an integrated ballast resistor. I don't remember reading in your posts whether or not you have already replaced it. Blast out the idle air control valve as this has a tendency to mess with idle and power when it's gummed up. Lean on someone who has a hand held dwell/tach meter. Start the engine, put it into ECU tune mode by grounding the connector in the engine bay, loosen the distributor retaining nut and hold rpm's @ approx 2000. Swing the distributor between advance and retard gently until you detect a small spike in rpm and lock the distributor in place. Test drive and observe power delivery. If you think there's a misfire, run the engine in as dark conditions as you can and look for signs of ignition arc. Even attempt to propagate misfire by spraying a light mist of water over the leads and spark plug boots. If I've already recommended any of the above just ignore it lol. I'd also run it on midgrade/89 octane. You should notice a difference between running on regular vs midgrade (better throttle response, smoother power delivery, increase in torque) 91-94 premium seems to nerf torque on cars not designed for it (just my experience and it costs a buttload more...)