Back in the hunt for these

Couple questions...
1. Are the springs linear rate front and rear?
2. I am interested in a custom spring rate for the fronts, will the dampers be custom valved for the springs from the factory? 392 lbs/in is perfect for the rear but I think something stiffer is called for up front.
3. Do the rear springs use the OEM perches, i.e. what diameter are the rear springs? Are there custom perches that install on the LCA's like the H&R's?
Couple of things Fernando...
I am picking my car up in LA in a couple of days and I am eager to move into the next phase, my H&R coilovers will be moved over to my DD so...
...I am ready to buy these in the next week or two... :evilgrin:
PM me if you wish
Regards,
--chaz