On 1970 lowbacks to suit 1302 S

I can see that the metal spring packs are the same LH and RH.

I need another spring pack for the upper RH drivers seat, so I can use a S/H passenger upper metal spring pack.

Remember it is not the frame I need, only the high tensile spring pack.

Is the high back spring pack the same, just with the headrest attached to the seat frame?