1974 Brain Box saves the day.
After a second look at what is left of the case and the epoxy, looks like there may be a whole other secondary board down in all that epoxy. Don't know how I would get that out without total distruction..
I do have a photo of the back of my '74 module that melted most of that out from the hot Florida Sun as a clue to what is in there.
This one from '74 looks really nasty, though it performs perfectly yet. That's the way i like to see them built. Coming in half shot up and still working like a charm.
Blue 4 pin below:
'74 heat ravaged module below:
Mopar Original '74