Don't and won't use them unless and until someone can answer this simple question: if the knuckles interchange with no problem, why would Chrysler invest the not-insignificant coin in tooling up for a new part?
You won't EVER get an answer to that until you speak with the engineer that decided it may be an issue. It could have been as simple as, these aren't the same height, 3/8" difference, they won't work. 10 years later we were putting them on the cars without issue. The binding issue has been debunked and the guy that wrote the original article admitted that. Bumpsteer has been tested and is really not an issue except at the extremes of range, some actually beneficial. Go figure.
Chrysler made the K car... that's more dangerous than the spindles.
Make sure you don't go to any shows or drive next to many A bodies as a lot of them have these dangerous spindles on them.