I have an 87 firebird I'm gonna sell ,was gonna swap the t-tops with my 83 TA ,cause the 87 has locks on them . but the 83 has a plastic trim peice all around the out side and the 87 does not ,since I'm gonna put new weather stipping on the 83 does it really matter if the plastice piece is missing, or will it be too loose in the center track .