Hi all.
Those of you running John Tailor's upgraded rear leaf springs.

I just want to know. are they much stiffer than standard leaf springs?
Can I put such stiff leaf springs in my sedan and still have a drivable car on the street or are they too stiff for normal road use.
Now the big question.
As you all know I am from south africa and cannot get such springs here.
How can I get hold of Jeff to find out what stiffness I can reset my springs to so that they are the same as his springs.