I believe that they were supposed to be 3.5" since I have a D60 giving it another small bump up.
I know that the rear is shackle flip with tired K10 springs and a 1" zero-rate. It sat right until after BB20, now the rear springs are done, squat butt again.
I need to go order some new rears, but I have to finish some other projects first.
I did go pick up a set of 4 ORD spec springs for a friend today. The guys at Alcan told me how they have been slammed, and ORD had sent them lots of orders! They were pleased!