one more quick question, will the 1988 vent bezel fit in my 83? it looks a little different to me, as far as the profile and fit...Okay no pics on hand but I pulled an insert out and took a pic. As luck would have it this one has both types...upper held on with the spring steel clips (2 in the center) the rest held on by the plastic tabs...
One upper clip missing on this one...
and the one end...
on the left hand side the vent bezel housing has raised tabs that hold that side in...
Hope this helps.