I know that this is an old thread but...has anyone figured out whether the IMRC "box" can be wired in place of the IMRC vacuum solenoid on a '95?

I suspect that it can be, UNLESS the signal from the computer to the IRMC box isn't a simple on/off signal like it is on the '95. At worst it might be some sort of pulse-width-modulated signal and the computer uses feedback from a sensor in the IMRC to know when the secondaries are open, but:

1)I can't imagine Ford engineering something so absurdly complex, especially for something that operates in only two states: fully open or fully closed (adjustments of the IMRC stop screw not withstanding)

2)My understanding is that there is some circuitry in the IMRC box. This circuitry probably handles the task of sensing when the secondaries are open and controlling the actuator appropriately, so that the input to the IMRC box can be a simple on/off signal.

3)Although the IMRC box may have an output to the computer letting it know when the secondaries are open, this is most likely NOT required for it to operate, so the '95 computer's lack of an input for this signal shouldn't matter.