My Timbren suspension has the 4" drop spindles. The great thing about them is that you can mount them wherever you want. Just build the proper mounts. I'm using 2"x4"x.25" steel rectangular tubing as my mount. If the tongue is not level, I just plan to add another piece to increase the lift. The rectangular tubing will bolt onto .5"x4" aluminum frame stiffeners. The frame on my Schutt trailer is aluminum.
SamM