Leaf Spring Relocation Kit

@72bluNblu... I found this discussion from several years ago, but always relevant i guess. My 71 Demon will have a 3" spring relocation. It will be mostly street driven, with some time on the open track/autocross as well. I was planning on using the Hotchkiss leafs, but curious if you'd suggest something better considering the wheel rate discussion above? Will have Hotchkiss 1.5 shocks as well and some sort of rear sway bar. Thanks