These are very accurate reproductions of the D0WB-6544228-B / 29-B Rear Spoiler Gaskets that were used for the 1970 Eliminator. The contour of the gaskets fit the spoiler pedestals very well, and the left/right bevel is consistent with that of the OEM design. When comparing the over-all construction of these new pieces to my 40-year old FoMoCo originals... I would say that these are right on. When used for the 1969 application, these gaskets will fit & perform better than Ford's first attempt.
Also, I like the fact that there are thin membranes of rubber remaining in the gasket's molded openings for the pedestal studs. This will allow the end user to pierce small holes in the membranes that will fit tightly around the pedestal mounting studs during installation. The added bonus of tight seals can help keep unwanted water from seeping past the deck lid.
Thumbs up on these!