this is a motor i recently purchased with #2 and #4 cylinders not firing, i have determined that it is a faulty sensor coil via resistance test, and the remedy is to replace the 'canned' timer base assembly, however when i removed the flywheel i have a clear view of the sensor coils that seem to be easily removed, is this normal in a 'canned' assembly or has someone possibly changed the ignition system on this motor. The other possiblility that is bothering me is that the motor is possibly not a '73 as stated on the paperwork. Any help or theories would be greatly appreciated, thank you. 