Those rear springs were used across the board on '70 Charger R/Ts.

1970 Charger R/T 440 auto 3.23s open 794L/964R
1970 Charger R/T 440 auto 3.23s S/G 794L/964R
1970 Charger R/T SE 440 auto 4.10s 794L/964R w/sunroof
1970 Charger R/T 440 4-spd 4.10s 794L/964R
1970 Charger R/T HEMI 4-spd 3.54s 794L/964R

With that info I'd assume all the 440 & HEMI '70 & '71 b-bodies used those springs. 1969 - NO, 1972 - ??