I recently purchased a '48 CJ2A. After having the engine professionally rebuilt it will not start as it did before the rebuild. It has been converted by previous unknown owners to a 12 volt electronic ignition system and worked fine before. Now I am not getting spark out of the coil. I have replaced the coil, the coil-distributor lead, battery, battery cable, starter solenoid, spark plugs, all to no solution. The coil cable does not appear to be delivering any spark at all. I am at a loss as to what to do next as I am a complete amateur "mechanic". The old coil had absolutely no markings, no manufactures name, no model number on it. The guru at the auto parts store recommended a '78 Chevy coil as it appears to be virtually identical -at least visually- to the old coil. Can anyone tell me how to trouble shoot this coil problem? I have no idea how to test the 'primary ignition' system, whatever that is, on the coil. Any help would be greatly appreciated.