Jose,
There are two different covers. The 65 version has a larger opening for the "bumper" attached to the latch assembly, but the bumper was not used in 1966, so the hole in the cover was smaller. I have both a 65 GT and a 66 GT Fastback in my garage, but I concentrated on the "restoring" the 66, so not too many pictures of the 65.
Pictures: The 65 ready to go, the 66 is "waiting".
Jim