Can i use these 70 charger seats
Those are 1 year only 1970 buckets.
70 seats have a separate (pot metal) cover for the seat forward button, and a separate seat back. 71 & up
the seat back and forward button cover are all 1 plastic piece.
Those seats in the condition they are in, would fetch $1000 & up.
I would get a set of A body tracks, and bolt them in.