I knew about the Mitsubishi carbs for years and wished you told me
that you where after these jets. Youve found out the same way I did :)

I think the main air jets need to be around 185 as far as I remember.
There was a thread somewhere on someone with a similar setup here
from america Ill try and find it...

edit found:
daftinnovations quote
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Ok i took out the jets cleaned the carbs and the mains said 160 on it. i drilled it with a 1.85 mm so 185 and the car is like night and day still havnt tached it over 4500. runs titi-lisious so far. Will dial it in a little better.
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http://datsun1200.com/modules/newbb/v ... ASC&type=&mode=0&start=20

So night and day difference can be expected!!!!!!!!!