You could obtain an older style Duraspark distributor from a late 70s early 80s 302. Also, you will need the Duraspark module and a connecting wire harness. Keep the newer coil and connect it to the Duraspark module. The older distributors have an electromagnetic pickup that triggers the Duraspark module which runs the coil. The distributor would have a vacuum advance and mechanical advance that could be tuned as needed for optimal efficiency once it's running.
You could also go to the aftermarket to do this. You would need a distributor, and a module from any of the companies like MSD, Mallory, Accel, Pertronix, or others (see Summit Racing or Jeg's online catalogs for starters
The cheapest way would be the Duraspark method. It would also be recommended to upgrade the coil to the more modern, more efficient, and stronger sparking "TFI" style coil that looks like this (if it does not already have this style coil):
There is a great page on adding Duraspsark with a TFI coil on this page: http://www.trailhed.com/duraspark%20upgrade.html
There are pictures and wiring diagrams to help.
You can use a stock or aftermarket TFI coil.
For more info, you can search keywords "TFI coil" and "TFI upgrade" on Google.