3.5 inches is the most you can do in the front with just shocks, springs, spacers, coilovers etc. At 4 inches of lift, the front shocks are at full extension and you have no suspension droop left. 3 inches is the max recommended height since it will ride much better and the rest of your suspension will last much longer. Any more than that, you will start to burn through CV boots pretty quickly and you are going to put more stress on the shocks, ball joints, steering, yada yada yada.
Stacking spacers on top of coilovers, lift springs and/or shocks is never a good idea and will usually not work properly.
If you want more, You will need to do a drop bracket lift (Fabtech/BroComp) or a solid axle swap.
But like others have said, why do you want to go so high? I'm at 3.5 up front and 4.5 inches in the rear with a 2 inch body lift and i wish it was lower.