Hi all; I put an electronic conversion kit on our 67 about 2 years ago. It came with a new Ballast resistor with only 2 terminals (the old one had 4). I carried the old distributor around for about a year, but have yet to have a problem with the new system. I had changed the charging sys. earlier, so the mounting bracket for the old regulator was a handy place to mount the control box. Larry 67 Crown 4DRHT