Rear Crossmember/Spring Slider/Spring Relocater

Hey guys here is an unfinished project I am working on. It is a leaf spring slider mount. It works as a mount for the spring sliders, a frame stiffener for the rear and it also moves the springs inboard the frame. I still need to build the end plates to weld the unit to the frame. I am also going to build new spring mounts for the front also. Let me know what ya guys think. Any and all suggestions will be appreciated. I'm thinking I may build this as a kit so feedback while in the prototype stage is a must.
THANKS!