GM module wiring

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Found this way to get around differing reluctor coil characteristics.

General Motors HEI Ignition Module For GPZ550

And a really in depth analysis on adapting the GM module, scroll down to the bottom to read " Some notes on usage with an early 80's Kawasaki KZ reluctor: " and " Some notes on usage with an early 80's Honda CB reluctor: "

http://www.geocities.ws/loudgpz/Hei4pinGmIgnitionNotes.txt

Wow this gone a little more in depth then I thought it was going to and I'm not looking to modify this car all that much. Also I don't want to buy another module either and I appreciate all the help and info so with that said I'll leave it be. Thanks again you guys saved me a lot of trouble.

There is some work but the wiring consists of post 16. The easy way would be to use the case from a non working MB box that way none of the mods to the car involve cutting wires. Granted, if your system is still working no need to change.

Getting the tach to work / if the signal is used in other parts of the car is the only unknown.

I'm getting the feeling that the MB system is " Capacitive Discharge ". CD has a fast voltage rise time to fire fouled plugs, a slow rise time of a non CD system can allow current to leak across a fouled plug. CD tends to have a very short spark duration, this could cause a miss fire if the fuel air mixture isn't good / combustion chamber poor. However, the short rise time can allow for multiple sparks per ignition event if the system is designed to do so.

CD was pretty much abandoned in the 70's when better electronic ignitions took over and higher voltage was king.

Inasmuch as nothing is broken, there is nothing to fix. Consequently,mb, the conclusion that you reached, above, is the correct one.