Well, I put a timing light on it today.
My light dosent have a directional arrow for the pickup that goes on no1 lead. Tried it both ways and no difference.
Set timing to 6deg BTDC with the vacum advance un-plugged and motor at roughly 800rpm.
Then I plugged the vacum advance on and the idle turned to shit, but still reved ok.
Upon having a look with the timing light the timing went to over 20deg advanced with the vacum hose connected.
Mechanical advance works fine, car runs smooth and seems to rev nicely but I'm lost on the vac advance.
I'm unsure why it runs the way it does with the advance connected.
Thanks again guys.
Todd.