The Slammer / Super Slammer are designed for those that want to lower ONLY the body (I think they used to call it challeling) keeping the suspension at OEM height.....so naturally you would have to raise the driveline (tunnel) and the inner front fenders for tire clearance. I have found over the decades that while many like to talk about such a project, most do not want to do the mods and are looking for something that simply bolts in.....so they are not a big sellers.