64 dart brake/suspension upgrade

been a while since ive been on here! looking to go to a disc brake set up on the front of my 64 dart. was thinking about just spending the money and getting a wilwood bolt on kit and having the piece of mind. but i have been reading alot on here of just using later model stuff and making it work. what would the better choice be? is it worth doing a wilwood set up or am i better off the other rout. also i want to revamp the front end. looking at a pollygraphite kit from pst. any thoughts on that? thanks for the help!