I shot 2 hours of video for them when it was at the Mustang Owner's Museum few months back. The mounts are still there and holes from where the generator was mounted to run the cameras. It was crashed several times during the shoot and lots of bondo slathered on to do quick repairs. His grandfather got mad once because his mom had parked in his drive and crashed into the front of the car. So he did replace front bumper and valance and grill. The gas tank was replaced and the engine rebuilt. The PO has a body shop but never painted the car. It just sat for years. He told me the only thing he was keeping off the car were the two misspelled Bullitt license plates.
It was far from pristine for sure, dents all over it, so who knows how original from the movie set it really was.
Like I mentioned, I did not see the mounts as it crossed so it was quite likely just the camera angle. I mean to have removed them would take away from the originality of the car. For those who have not seen the license plate, here it is. Maybe only 6 letters were allowed, hence the 'misspell' Bullitt is 7 letters.