Instead of helper springs why not just fab up some solid metal blocks of your desire thickness (to achieve the ride height you want) between the leaf springs and the axle. That is really what you are doing with helper springs. They aren't going to be used for their intended purpose but they will become spacers. I removed the helper springs from my 03 Dodge Ram along with installing a 2" drop kit to "level" my truck. Because I needed to drop 3/4" to get it level. I know that longer shackles would do the trick but I just don't like the shackled up look if you know what I mean.