Re: 95 2.3 in an 83...
This maybe unrelated, but I'm in the middle of a 2.3 to 2.5 swap.
I did notice that on the end of the speedometer cable that goes into the transmission there's a sensor. I have to think it was a speed sensor.
However, I didn't take note of whether or not the sensor was easily removable from the cable, or if it was removable from the cable at all for that matter. In any event, maybe all you need is a speedometer cable from a newer model with a sensor.
Rangers, '95, 2.3, '98 2.5, 4x2 extra cab's, '96, 2.3 base model, '99, Mazda B3000.