Hotchkis TVS for A-Body's!

Summit racing has the kit for $1852.99:
http://www.summitracing.com/parts/HSS-80113/

The issue I was wondering about was the leaf spring rate is 130lbs/in, That is 30lbs/in less than the SS Springs. Any spring people know why this would be better?
The spring design looks nice being CNC'd bent, 1" lower stance, and rounded bends at the end rather than straight to the eye.

Super stock springs are were designed for drag racing, not handling. And way too much arch for handling.

Mopar circle track springs have less rate than stock ones even. The big thing is to have a strong front segment that does rap up under acceleration off the corner and don't hop under braking coming into a turn. That second situation is greatly helped by proper choosen shocks.