Today’s A body work. Love this car!

I didn't look through any of their kits, but they may have one that retains the small bolt pattern if you don't want to replace wheels. I bought a Wilwood kit a few years ago to add disc brakes to my 65 Barracuda, and it will accommodate either 5 on 4 or 5 on 4.5 inch wheel bolt pattern. I'm not far enough along to install it yet, but hopefully it works good. As much disassembly as you have to do in order to install new LCA bushings, you might as well do the upper bushings too, and swap the brakes at the same time. If you rely on it as a driver though, that might be a pain to get all that done on the weekend in time to get back to work on Monday....lol.