The lever that releases the seat back is in a different place starting in 70 , it's up on the side of the back instead of a lever on the bottom pivot arm , if the seat back material is not cut for that , which I don't think it will be, you should be able to use the 69 seat as everything else is basically the same . The headrest are also different , they used a headrest that looks like the 69 bucket seat headrest , but I'm pretty sure the post spacing is the same .