'92 a518 vss to '97 OBD2, compatible?

The whole package is going into a '77 D150 (basically a beater with a heater), as kind of a test mule of sorts, since this is my first foray into the magnum/fuel injected /overdrive field. I'm not ready to start chopping into my Duster, but there's a chance this drive train (or one like it) may end up in there. I want the trans o/d and lockup to be controlled by the pcm, but I'm not sure how changes between obd1/obd2, or the re/rh transmissions will determine what combination I need to use. I'm assuming the (correct) pcm uses a vss signal to control the a518, and I'm still searching for '92 schematics for more info. I could hook it all up stand-alone style, with pressure and vacuum switches, but that to me defeats part of the reason for keeping the computer.