All the front spring hangers I have seen are designed to replicate original height or lower it, so it won't acheive your desired increase in ride height by changing them.
What a lot of people seem to forget is that the XHD springs packs are desigend to replicate the factory ride height. They aren't designed to lift the rear of the car. Their real advantage in tehse spring over old, used springs is not in height increases so much as it is in torque control. Mopar springs are designed and installed to have very little to no arch in them in their installed height.
The mopar Super Stock spring set is designed to lift the rear 2-4" over stock, however. This design is to allow greaert leverage against the car to plant the tires harder during full power launches.
If it is a particular stance you are after, you could turn the front torsion bars down. Dropping the nose 1-2" inches does not impact ride quality much at all and has the added benefit of lower the center of gravity height. You also could look at mixing tires sizes like the AAR/TA models did. I would only re-arc the springs if you feel lowering the front or changing tires sizes isn't the way you want to go. Adding 1-2" isn't going to hurt the angles in the driveline if you do re-arc the springs.
