Great info.
Seems I recall this being posted here before, though it looks like there's been some updates since then.
It's interesting how the numbers vary so widely (someone mentioned the taller coils were stiffer for less body roll, but RE (Rubicon Express I assume) and Rock Krawler's numbers appear to debunk that theory
Makes me wonder if some TJ numbers might be getting caught up in there.
I'll add from my own experience the JC60F 6" Skyjacker coils have a 22" free length, and the Rancho 3" coils are 18". The SJ coils 'feel' like they are a slight bit stiffer than the Rancho, even though the Rancho has a higher number.
I don't s'pose you've come across anything similar for early Bronco coils? I know there's probably a number of them with rates in the low-300s such as
these from JBG, but something about 2" longer than those would be useful also.
(516PPI is just asinine on an EB. That should be more like TIB F-250 stuff
)