Just a FYI. New plugs might be correctly gapped at the factory. But they still need to be checked for the correct gap "Before Installation" because if they are dropped in the box and land on the ground electrode they can close up, even to having "No Gap". So.........Best Practice is to always check them before they are installed. It only takes thirty seconds and look at how much beer drinking time was lost.
Converting over to a more modern mechanical and vacuum advance distributor is a sound performance improvement.
fordsix.com is a good resource for this information.