I'm looking at buying some gfx, and I'm just wondering if different models or years have different gfx? I mean.. let's just say I get ground effects from an '87 trans am, though a few of the parts are beyond repair. Would an '83 trans am's gfx match up? or a '91 GTA? I guess the primary concern here would be the sides, not so much the nose and tail, but mainly the sides. Any advice? Thanks

EDIT: A bit of searching around a bit extra has landed me in the direction that I've found:

1.) 90-92 GTA fenders are different
2.) 85-90 and the years before 84 are not "easily" compatible with swaps.

But still as before, I'm still wondering what I have to work wit has far as lenience in different years/models gfx would be.