Question about 69 Dart seats/headrests

As far as I know the headrests with the chrome strips are the only correct ones for 69 buckets. My understanding after research is the car actually built in 69 have headrests & the 69 cars built in late 68 did not. As far as adding headrests, the frames have the holes in them but you will need to install all the hardware & headrests. everything you need to add headrests including the headrests is available from the repop companies, just depends on how much you are willing to spend.