Hen,
I think Grega has the right answer, I was not sure if it was a 4A or 4K dizzy. The setup you want is the same deal I have on my 100kw fitted with 45 webers, it will need a spacer to increase distance from head as 4k shaft is longer and also to fatten the shaft as it is narrower than the 4age dizzy shaft.
I'll ask the guy who built my dizzy about the specs and PM you.
Cheers Chris
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