while i was at it i also replaced the seatbelt sleeves. the old ones were really worn and i had these for years so i finally got to replace them. there were some wire to help hold them up but i felt it was unneeded and did minimal
i did the similar method i did for the F250 sleeves.
https://www.supermotors.net/registry/26713/85820i warmed up the sleeves by having them in the engine bay of a hot truck. i cut the corners off the metal mount tabs of the belts. used 16ga wire to pull the belts through the sleeves and then done.