High Back Buckets from a 74 Charger

OK, so lets see if I have this correct. 70 to early 71 had soft backs. Late 71 and on had the one piece plastic backs that covered the hinges. So that means the 72 demon buckets were hard backs and because of that the foam is specific for that reason?

The guy I got these from also has 71 high back buckets from his Satellite. Would it be better to get those even if they had hard backs? Is there a big difference between 71 and 74 high back buckets?

Attached are the seats he brought me. If these will work for 72 Demon foam and covers we will use them. But, I still don't see that they sell 72 Demon foams.

Can I just use the 71 foam and covers even though this is a hard back?

Bill

Seat1.jpg

Seat2.jpg