1974 Brain Box saves the day.
Cut open another Mopar Brain Box
This one appears to be the "Chrome Box"
5 pin
Looks like this one was built correctly with the correct working transistor that fastens to the heat sink.
Also there was no filler fine sand in this one, just the gel sealing compound like is supposed to be in there.
Proper Transistor 034
Fake chinese transistor on top (empty)
Correct 034 transistor on the bottom