Caltracks VS Super Stock Springs
I can't tell you about mopars exactly as I'm still building my first one...
On my amx since there isn't alot of options in the first place I installed caltrac bars and split mono-leaf springs along with HAL single adjustable shocks.
All I can say is my 60fts picked up and got consistent compared to the "New" stock springs I had.
http://www.calvertracing.com/