Being challenged at seeing the defining details for each version of brackets in my pictures in any volume that would seem helpful. Especially when the differences can be viewed best (installed) from under the car.
Which ever version you choose will mean that you'll likely have to note that there are other versions or years not being reproduced at the time.
Based on the largest production period I believe you may choose one of the two middle versions.
What I can offer are the following observations
#1 appears to change somewhere after 8T20926x
and some point before 8F21024x - Yes two different plants just offering data points.
#2 I found used originally on 9F18838x, 9F20888x, 9F21490x,
Since the "cut away" on the lower support arm is positioned above the rear lip of the front cross member I found it difficult to even see that detail once installed in pictures from almost every angle.
Sorry I tried to help more also didn't get through my Shelby pictures
but its been a couple of days and wanted to respond .