Confusing Spindle I.D. Article

That article is just a reprint of the original published by Mopar Muscle and now hosted by Hot Rod.

Swapping Disc-Brake Spindles - Mopar Muscle Magazine - Hot Rod

Looks like they just flipped the picture. The 73+ B/E and F/M/J/R spindle is the taller one. The A body spindle is a little “chunkier” looking too, the later ones are smoother, more rounded and a few pounds lighter.