This is what I got from the special.php page: "Y88 - 1978 they came out with the Gold Special Edition Trans Am which had the Y88 designation, but just like in 1976, it did not matter if the car had t-tops or not, they were all the same Y88 code." Maybe I am reading this incorrectly.
I know what you mean the numbers are against me, the current owner got this car from some teenage guys who just ran into the ground, they traded the Trans Am for a 1980 Toyota corolla just because it was running, and their Trans Am was out. They also changed the interior from the gold color or camel to the blue, because they didn't like it, so they might have done the same to the front too. Just speculating.
Mike.