Im not exactly sure. Is the car a Limited?? Is it tan leather interior?? I have a 86 T-type with Dk. blue metallic paint and tan leather interior and column shift. Supposedly Kirbans says there was fewer than 50 built in 86 with this interior. Im not sure about the 87's though.
If it has the tan leather I would say it would be pretty rare. If its tan cloth interior Im not sure. I've seen a couple with the tan leather and a few with the tan cloth interior.