Could you post some pictures of the old dead ignition module on the right side of the above picture, if you still have it?
What is the part number on the housing of this old one as well?
I'm not sure that have seen the 1983 style Igniter module inside, and I've always assumed that the PCB was potted in the black sealant like the Cressida one you show.
Is the rear side of the module visible? I would love to see what components are on it.
In any event, great job making the switch. That's encouraging to others who face the same challenge.
Dale