take a look at this thread it might help some.
the 2nd picture should give you some reference.
https://www.gmt400.com/threads/88-98-bucket-seat-alternatives.796/
the W/T and Cheyenne swap over the same i got to the yard today and only found 1 GMC that the grille was still intact
ill post the pics in the next few days
iv been trying to find a complete write up for you but i cant find them any more
if you can wait a few weeks ill take some pics next time i go to the yard
i plan on swapping my grille over to the 95+
check out these threads just have to do a little digging
https://www.gmt400.com/threads/95-98-grill-in-a-88.49717/#post-1105070
https://www.gmt400.com/threads/changing-88-93-gmc-grille-to-94-98.33592/