Dampers sold as +2" usually refers to the extend length, the actual range of movement (travel) is nearer +1"
Lowrering damper mounts doesn't increase travel It just moves both the fully compressed and fully extended positions of the damper relative to the chassis.
As a result You setup will be more like +1" travel on the front. The front axle can still move 4" lower than standard but the suspension has 3" less upwards mvoement as a result.
Do the dampers rub when full extended, cully compressed or just when partially articulated?
Where on the dislocation cones are the rubbing ie front, back, inner or outer edges?
If you don't need the full length of dislocation cone then you could trim it, though be carefull not to let spring slide off the end of the cone. My experiance of the open cylinder type dislocation cones is they can allow a spring to dislocate by a few inches, but can't relocate a spring thats fully dislocated off the end of them. If you do trim It may be worth looking at the Gwyn Lewis front turrets with inbuilt dislocation cones. These are cut at and angle as the spring only touches the cone in one area when dislocating.
http://www.gwynlewis4x4.co.uk/page51.html
