[Healeys] 123 distributor (GB6) in BJ8

[Oudesluys]

The ballast resistor is probably necessary. The electronic ignition 
requires a certain given resistance over the coil with or without the 
ballast resistor (in series), usually this is around 3 Ohms. Often the 
coil is around 1,5 Ohms which means you need a resistor of 1,5 Ohms.
If you have a coil with a resistance of 3 Ohms you will be OK, if lower 
you have to get a set of coil and resistor because these coils basically 
are 6V items being in series with the resistor.
Check carefully in your fitting instructions. Failing to fit the ballast 
resistor may fry the 123 ignition.
Kees Oudesluijs

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