DOH... I typed out loads there and lost it...
Anyway think dizzy and arm were an issue. The old arms contact bit was about 1mm shorter than new and looking and on new one had nice thick even contact patch, old one had thin wavey and would say almost looked patchy contact.
The Caps contacts were considerably worn and had about .5mm if not a little more white powdery corrosion between solid material and the rotor.
I checked carefully and it looks like the old cap and arm would have actually needed to jump a gap bigger than a sparkplug gap to actually make a spark.
Never worked on a car with dizzy before but I am guessing all the white powdery corrosion is due to excessive sparking and will degrade contact??? Maybe someone can confirm if I assuming correctly?
Thanks
John
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Just double checked it in house.
Scraped off the white crap and there is defo about .5-.7mm of white crap between rotor and solid contact and there is only little bits of contact showing along edge of rotor.
Carefully checked and there is about 1mm-1.5mm of clear air between rotor and contacts. must have been well worn as there wasn't even a mark in the white corrosion were rotor was running.
Fingers crossed that is the only issue 
