They fit well enough. Most of the Camaro spoilers are ABS, so they’re pretty flexible. You can basically pull them into place with the mounting hardware, if you’re really intrepid a little work with a heat gun makes the process a bit smoother.
I have a ‘67 Camaro spoiler on my Demon tribute, it’s a bit taller and a bit narrower than one for a ‘68/69. The OER version sells for under $40 most places.
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