Traction Bars?

They put un-do pressure on the front half of the spring, lay very low to the ground as well.

I see it this way, since a bud of mine can run his all steel Dart to 9.80 dead straight and quicker on stock OE slant 6 springs and T bars, what's the issue at hand for most suspension MODs?
OH, no pinion snubber. No traction bars. Lots-o-rubber and a away he goes.