OBD1 PCM interchange/compatibility, 5.2 vs 5.9

Well, here's the newest snafu... in a long line of. I dug out the PCM from the Dakota, and it looks like it's been replaced at some time. No factory sticker, little ones that say "warranty void if removed" and an illegible paper label. So I'm not even sure this is a '92 5.2 computer.