Matt, FYI, Prestige Mustang had an 86 white low-option coupe in their yard. I got my seatbelts from them (regatta blue) and it might be worth a look if you need parts. Todd (@ the yard) had a complete set of blue seats the last time I called. Might be worth a look if you need that stuff:
http://www.prestigemustang.com/index...71&cat=2&pic=1