His Grand would actually be a 93, but they where availible in early 92 but called 93's. (like the TJ's you mentioned)
They are basically the same as the 97, the front bumper is a litte different as it had fog lights in the lower fascia areas. And the grand cherokee was on the doors and not th fascia on the doors. So basically body wise its just all the plastic is is different and the interior. You could use a fender if that is what you are after.