Here are some $40 Eagle Talon seats I put in my Uncle's `71 a couple weeks ago. `71/`72's have odd-ball tracks and someone had boogered up the chasis trying to weld in 'normal' seat tracks. It's only a baja anyways.
http://photo.starblvd.net/Silver77/3-4-2.jpg
http://photo.starblvd.net/Silver77/3-4-4.jpg