72-74 Charger bucket seats question..

I sold those '71 seats to a member here close to two years ago.

1971 bucket seat frames have two versions, early & late. Both have an inner spring in the seat backs.

1972 up seats have more foam & no more spring basket in the seat backs.

From 1970 through at least 1974, A, B & E body seat frames are the same inside the same time period, the tracks, foam & upholstery are different though.