I remember removing the sway bar on a 1968 or 1969,CRS, GTX. It was held on the A arms by two small diameter rods, one on each side and two clamps held onto the K member by two 5/16 or 3/8 bolts. What I'm saying is you need the tabs on the A arms, you could make your own and weld them on or have someone do that for you, drilling the two holes in the K member for the clamps is no big deal
Isn't there several different vendors offering sway bar kits for those cars now?