Hi-back buckets

[70 Plum charge]

Doing my first restoration on a 70 charger 500 and could anyone tell me if the seat frames are all the same from 70 to 74?

 

[68sprtsat383]

Welcome

 

[Sahara]

I can’t say for sure in your case, but here’s my story.
I did high back bucket seats for my ‘70 Coronet. I had a miscellaneous pile of seats, at least five seats. Two were original to the car, one was from a ‘72 charger, one was from a ‘70 cuda, one unknown origin.
All seat bases and backs were identical and interchangeable. The only difference was left and right, and even then that’s because of the latch. If you’re a welder you can even swap latches side for side.
Seat tracks are different between models, but backs and bottoms were identical.
I hope that helps.

 

[moparmarks]

70-early 71 are different than late 71-74. Early seats have 3-piece backs with metal hinge covers. Later seat have one piece backs. Release buttons are different too. That being said the upper frames are different.