it's possible, but the rear tail lights are going to be differant because the rear wiring harness (c500) connectors were differant from 85 to 86,87,88. I put an 86 fastback clip on my 85, and i had some difficulties with the rear taillights. For example, when i brake now, both the yellow and red lights come on. Little things like that, and like the fan would stay on all the time, because there's a wire in back, that deals with the front cooling fan. So it's possibile, just gonna have to work out some kinks..any other questions, feel free to ask
-Coop