1968 A-Body suspension question?

(1.) I just bought a 1968 barracuda and was going to switch to disc brakes. I got the setup from a 74 Dart. While at it I wanted to swap the non-tabbed lower control arms for some "tabbed" LCA so that I could add a stock sway bar. When looking in my 1968 parts manual there isn't one listed for the A-Bodies. What's up, did the 1968 A-bodies not come with a sway bar option? If so, which year did and would bolt right up to my car and these 74 spindle? I'm also going to use the 1978 Cordoba 11.75" rotors, AR Engineering's adapters, Wilwood calipers and 15" rims. Anyone here have this setup.

(2.) It has the 7.25" rear and I would also like to switch to the 4.5" lug pattern like the front and have all LH threads. Does someone make an axle swap for this or is there another option that would look somewhat stock?