k frame difference

^ what he said. The 73-6 k uses it's own mounts,idler arm,pitman arm,centerlink and sway bar. I also prefer the 73-up k frames. I put the mount bolts in backwards so all I have to do is loosen the nut and tap it backwards and pop the motor out. It is also easier to drop the motor where it needs to be instead of trying to see if your dropping the bolts in the slots on the earlier ones.