What year seat is this...Plymouth or Dodge?

The reason I was thinking of changing it is cause it is so soft. Whoever covered it didn't do a good job as I can see lumps in it in places. Maybe I should just replace the interior cushions. It looks good, just not very supportive.
I think it's the best seat Chrysler ever made. Maybe get it redone with a more firm foam? Don't let me make your mind up. Do what you want. I'd just hate to see you regret it. I KNOW I would.