Will the drivers side bezel off of a 85 firebird fit an 84? While my headlight assembly is intact. I am missing the part of the bezel that says Pontiac and have a gap. I recently saw an 85 for sale but it states only fits 85-90. Thanks for any help

 

Should fit, but I cannot say 100%.
You should try some of the 3rd gen FB groups.

 

You need to check the outer edge of the bezel. I think the bezel was more curved on 1985 and up Birds. I know for sure the 82-84 Birds had a more square design.
Check out this post to see pics of the difference:
https://www.thirdgen.org/forums/elec...ml#post6487209