I don't know about the 1983-1987 bumpers, I think they were all the same. The only way to tell the '83-'87 LTDs apart is that 1986 was the first year they had a 3rd brake light. I'll go ahead and comment the corrections on the site, since some people (particularly Snoo...well, I'd rather not mention names , insist on making guesses for the particular years.)