I have a 1990 5.0 notch I recently pulled out of storage and am working on getting it ready for paint and a bunch of other work. I was in a wreck in it several years ago and they replaced the core support. I never noticed it till now the date stamped on the top of the core support they put in is 1987. Is there any difference between the 87 and 90 one. I looked at lrs's web site and they list 2 with different years. Any info would be helpful and thanks in advance.