They are 4" springs but lifted me more like 5"s. Where the e brake mounts to the axle is where it gets its height. Not sure what your bracket looks like. I can take a pic of mine later today.
Ok im not just doing a shackle lift. I am making extended shackles for the front and the lift is the result. Either or longer shackles front and rear are the norm imo.
longer shackles up front will rotate the pinion angle and change the caster if the front mount also isn't dropped at the same time, i think that is why people are telling you to not lift it in front with shackles
