I have a 69 Mach1 that we recently acquired which has a 428 Cobra Jet. I purchased an MSD Ready to run distributor model 8595 as well as new MSD 8.5mm wires and new plugs for the Mach. I could never get the new distributor to run. I am positive I have the firing order correct and after multiple attempts to install the distributor without running success, I decided to reinstall the old distributor. It fired right up and runs very smooth. I called MSD tech and they told me that partiuclar distributor needs 12 volts to the coil to run. After checking the voltage to the coil with my multimeter, I am only getting 4 volts to the positive post of the coil. Any suggestions on how to correct the problem would be appreciated.