The snubber and upper cup should do the trick if the spring floats in its mount. If the lower and upper mount plates have a detent in them for the end of the coil, like stock units, they should not turn or float. One idea for those wishing to keep a soft ride unless you load up with weight is to use a VariCoil spring. The first 2.5 to 3 winds are wound in an increasingly wider and closer together helix and then the rest of the coil is a standard wound coil. The light loads are taken up with the variable part and the heavy loads really get push back from the rest of the coil. Used them many times on my old chevys. They only make rear ones as far as I know.