the haynes weber book says the jetting for a 32/36 weber on a 1599 cc cortina engine is 1.35 primary/1.50 secondary fuel jet,1.70 primary/1.40 secondary air correction,with a 0.55 primary idle & a 0.45 secondary idle jet. i've tried this setup in my 120y with an a15,& it's still slightly rich in the main,so i've gone back to a 1.27 main,& it seems much better(only did it yesterday afternoon & haven't really driven the car).there are all sorts of combinations listed in this book,but the above set up makes the most sense to me.lots of set ups seem to have a larger main than secondary fuel jet & balances it out with the air corrections.hope this helps.