I understand where the confusion comes from given the problems and lack of traction enhancement the improper application and improperly adjusted "bolt-on" bars have caused.
However, I have 2 Mopars with slapper bars on them, and both of them are running SS springs that are rated hundreds of pounds below what either car weighs. I did that at the suggestion of Dr Diff, and the cars ride very nice with the lighter springs. However, I bent the front spring segment due to spring wrap without the slapper bars. That's why I experimented with slapper bars, and realized I needed to modify what was available to properly fit my Mopars.
It works incredibly well, but that flies in the face of decades mis-information out there saying the way they tried the bolt-on slapper bars proved they don't belong on Mopars. I call BS. They just didn't do it right.