There is another alternative for the 12v system crowd. Rebuild your 235 distributor, purchase an MSD 6 or MSD 6AL and install the MSD with either MSD's Blaster II coil (painted black for that stock look, or Accel's Super Stock Coil (black, chrome, yellow). The real wear part of the points set up is the points themselves. Current through the points until the points open and then current to the plug wire. This electrical connection will eventually deteriorate the points.
But with an MSD, the points act as a switch only, on, off, no current. The electrical function is through the MSD which is why no deterioration to the points. The points will last for years. Multiple sparks at lower rpm, which is where a lot of these motors tend to run, better fuel burning, better performance so to speak. If the MSD breaks for whatever reason, you just unplug the wiring and wire it up like a standard points distributor and you are on your way again. I have never had one fail but all things are possible these days.