Lockup 904 question

Bodyperson said

I have been researching this a little since the original post. A lot of bad info out there. I hope I am not passing on more disinformation but it seems there was a one wire version that was controlled by the " lean air" module. 1988 or so. You could probably control that one.

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Correct. I have read about those, but have never seen one. My 88 Diplomat has a LU 904, but not electrically controled. The vehicle has the electrical solenoid control wire at the trans but it is not connected to anything. What I am trying to find out is if it is possible to somehow convert the non electrical LU feature to electrical.
Like could it be as simple as changing the valve body, or modifying the existing valve body, or something similar? I realize I would have to drill a hole in the case to make the electrical connection.