School me: 63-66 Dart vs 67-72 Dart suspension

The groups are loosely 64-72 and 73 up. Early A's are narrower so the K frame and sway bars are shorter. 67 is special with a single shear idler arm like the 64-66 A Bodies. 68-72 uses flat motor mounts while 73 up uses captured round motor mounts. 73 up sway bar threads through the K frame and the lower control arms with sway bar tabs are different because of this. 73 also has larger upper control arm ball joints.