Have not looked into the mustang but think I read something that said all the fox mustang seats might work. I used the seats from a 85 escort in my 74 pinto. Just use the seat tracks from your floor pan and hold them up to the seat you want to use, most likely the seat pans will have the same bolt pattern. Some of the seat pans have 2 bolt patterns and only one set of holes will be tapped out. The escort seats I used in the pinto were from a 4door and wouldn't tilt so I took the recliner assembly out of a 80's something mustang and it bolted right up. Most of the 70's and 80's stuff look about the same.