I've got a 67 Series 2a 109 station wagon, that started up one day and then just quit and I have not been able to start it up again. It cranks over like normal but there is no spark. I replaced the coil and the Wire from the coil to the distro with the one off of my 88 and I could still not get a spark out of the coil. So what do I test for now? Ignition switch? I register 12 volts when I turn on the ignition at the postive terminal of the coil. but it drops when I start cranking. Any tips on how I should proceed, other than just start replacing everything?