Here’s a good video of the situation. You can watch the revs go nuts on the multi-meter beginning around :40. It stalls out eventually, with more pronounced misfires starting around the 2:00 mark. Injectors check out, fuel pressure is good. Coil and ignition amplifier are both new. Distributor rotor is fairly new. Plugs are new. New plug wires on the way. Various sensors are all new with fresh wiring. All grounds cleaned and checked. I also swapped in my backup combo relay (the relay that provides power for everything from the fuel pump to the injectors) with no effect. It has to be a problem with the ignition electrics, right? Or maybe something as simple as bad gas?