Chassis Guy/gals that understand SS Spring....Help!

All SS Springs have a 20" front segment. all but A bodys have to have longer brackets to make up for it
same wheel base
EDIT:
All but A bodys have to have longer front spring brackets to fit.
tubs would have to be modified other wise.
The A Body is the only one with a 20" front segment.
That why i wrote 20 on that graph above because that the front and rear length of my SS Spring
Compared to factory spec's