David ,
I have never fitted a 123 Distributor so unfortunately can not help with your problem.
But I'm interested in finding details about the ignition advance curve you have decided on . I understand when you purchase one you have a choice of about 8 advance curves .
Could you please advise what Static/Idle timing BTDC and what advance at say 3000rpm and again at 5000rpm (or Maximum )
Have you noticed any difference in the way the engine runs ?
Was it previously fitted with the original Lucas distributor ?
Most of them are well worn and need replacing.
Is the 403 still positive to Earth ?
Thanks
Geoff
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