65 barracuda stock to formula S suspension conversion

Yeah I planned on converting to disc, suspension was just a topic that had my mind spinning, I have two 65's, one with a slant six as a daily driver/ cruiser, and the second is currently mobile and road ready but I would like to make it a performance street vehicle, it currently has a 318 auto, and I have a 340 with an 833 4 speed that I would like to build up when the time comes, but like I said I would like to make it an all around street legal performance fish, thanks for all the help im sure I will asking for more help in the next few months