I have the vacuum advance connected. For no particularly intelligent reason except that’s what was there before – except it broke off the old distributor about 10 years ago. I’ve been driving without it ever since and not noticed the difference. Next job is to set up the timing properly and see how it really goes. First thing is to repaint the timing mark on the pulley which seems to have disappeared. Must use better quality masking tape this time.
Some more 123 related chat on aussifrogs…
http://www.aussiefrogs.com/forum/citro%EBn-forum/122749-123-ignition.html
Chris