Well I think the answer is "relative".

Mopar always claimed that their springs were biased side to side and the muscle cars had longer front segments to minimize wind-up. Fine - for the stock tires!

But as soon as you stuck some different rubber on the rear that changed things. Now you had the option of a s/s spring, an adjustable snubber or both.

Let's face it, a) the springs weren't cheap and b) the snubber was either "on" or "off", meaning to make it plant the tires it pretty much had to be touching the floor and that gave you a lousy ride if you left it there.

The slapper bars were a different animal, relatively inexpensive and they could be "tuned" such that they wouldn't do anything until you "got on it" and the springs started to wind up.

So my opinion is if they work for your Mopar, they belong on it.