27. The Fox seats, especially with the Sport style foam, are thicker/taller than the vintage seats. Some owners might have issues with steering wheel clearance or the headliner. Luckily, this ’68 fastback already had a Mustangs to Fear molded headliner in place, offering a couple extra inches of head room. Exceptionally tall owners might consider lowering the seat risers or a tilt-column conversion, but the comfort and support of the seats are worth it.