Im pretty sure that there are less t-top cars in 88 because they were suposed to be discontinued in 87 but they had some extras so they used them in early 88 models.
Mine's an 88. And it wasn't originally a T top car. They could be ordered at the Dealership. Anyone could pick out a car on site and it could be converted at the dealership. Cars and Concepts offered the kit to the dealers so they could retrofit cars on site. Mine was made a T top car by me. It was originally a hardtop. I had some damage fixed from a previous owner. I attached a pic. There's still some trim pieces and weatherstripping I have to put on, but it is mostly complete.
The black coupe in question above (If it is the one I have seen before) is a march 88 build date. The factory quit making T top cars in October 87. It was most likely done at the dealer. It doesn't make it any less desireable. I'd love to have an 87-88 coupe with t tops.
Mine is an 88, and it's an LX. I have always wondered just how many 88s (LXs and GTs individually) made it out before Ford's supply ran out. Also wonder if anyone knows a good 'cheap' place to get the weatherstripping besides eBay.?