I am slowly swapping the interior of my 88 LX convt. with some parts i got from a 90 GT Covt. I need to do something about the rear quarter trim on the car. I don't have the black ones from the 90 i gutted, and i know that i can order them from fox mustang restoration. The problem is that the only ones they have are for a 90-93. I am wondering if this will bolt up to an 88 car. I know they changed the design of the interior in 90 so that the rear quarter trim actually had speaker grills, but i don't know if the newer ones will bolt up. Any advice or suggestions would be appreciated.