Makes a bit more sense in that it's at least alphabetical
I see you have the galvanized buckets ... I've seen stock pieces are either plain galvanized like yours, and galvanized but painted an almost flat black.
Pontiac seemed all over the place with the 68 and 69 hideaway ... while looking at the 69 assembly manual I noticed it has a lengthy list of "revisions". They have the appearance of a hastily engineered system
BTW ... are those buckets original to the car? Some of the best looking galvanized pieces I've seen. All the repop stuff is painted. (at least all the repops I've seen)