What components of the suspension binding is he refering to?
I agree the rear is a little high, is compouned by the front being a little low?My car is about .75-1" high in the rear...........I can definitely relate to the dissatisfaction.
Cannon Racecraft should be able to make custom springs if coil bind is the part of the issue.
http://www.cannonracecraft.com/ if the shock length/travel will accept it.
Hopefully it's not linkage geometry.