It was a while since I did that, but I unbolted the Ranger tracks from their seats and then had to grind down the side brackets on them. Unbolted the tracks from the mustang and tapped new holes into the bottom and used the hardware from the from the ranger seats to bolt them back on. They sit a little higher than the bench but that doesn't bother me at all. Sorry for such a late response.

On your mustang seats, did you use the ranger floor brackets/tracks? Did the mustang seats unbolt from their tracks or did you have to drilll out rivets?