Well as luck would have it the ignition coil connector I ordered from ballengers is the same as one in the Holley kit. And it doesn’t fit.
So plan B: ordered the Holley 558-311 ignition coil harness and a metripak 10 pin connector to mate to it (part 570-203). The Holley harness has 10 pins… I’m guessing the 8 coil connectors each has a signal wire, and they all share a common ground and power? I’m going to reach out to Holley for the pinout info. Worst case scenario I cut the Holley harness up and rerun the wires as I need them…