277AD I believe. But I’m pretty sure that’s from a 97.. My first PCM got screwed up in a poor attempt by myself to test the fuel pump and accidentally sent 12 volts to the PCM... but that was years ago.... I got this one off here and ran it with no problems, so apparently a 97 will work in a 98.
They all work from 97 to 99. If you have the same features like 4x4 and all that. I have one from a 99 xj 4x4 4wd it shud work just fine. Pm if you still need it