You could possibly replace exisisting shocks with a longer travel aftermarket I.e rancho,tough dog maybe remove a rear shock one side ,get it flexed up to the maximum b4 the wheel lifts measure from eye to eye and also measure when then car is just sitting on flat ground to make sure the shock will fit closed
As for the front I'm not sure wether the strut is the limiting factor someone else might know
shocks won't give you extra travel, only modified suspension links will.
extended shackles on the rear leaves, and modified control arms in the front. unfortunately, just about any modified suspension package, is going to give you a lift.