I am certainly not disagreeing with you on the headrest thing; maybe I got lucky. My 69 fastback did not have headrests, but I wanted them. Someone told me that headrests were an option for part of 69 and were required during the latter part of the year. They said that all 69 bucket seats had the framework underneath for headrests whether they had the or not. So I found a nice pair at a swap meet, pealed back enough upholstery to install them (carefully since it was fairly new at the time), and sure enough the framework was there. Easy install. Maybe I was lucky.
