Pretty sure it won't without some jiggling. Sway bars for 68-72 are mounted under the front edge of the K. 73 and up are run through the K. So even if the 73 K has the holes at the front edge for the 68-72 brackets (I don't know if it does or not), the attachment at the LCA would be different. Maybe could be tweaked, maybe not. Might as well just get the correct model.