I have found that the woodgrain shifter ball came factory on 68-75 A bodies, was the white ball also offered as standard (no pun intended ) , or was the woodgrain the only option?
Not sure on the year of the change but I owned several of all year 4 speed cars MY 67-68's were black, 69-73 if balls they were wood . I had a 426 street wedge 65 plymouth fury it was white.