Dano,
I honestly can't remember the secondary jet on the Holly 600 for the 307ci Cheby. I do remember the primary at .059 sticks with me because that was the exact size of the stock rochester 2bbl had as a jet. It took much fooling around with jets to realize this. Maybe Carbking can steer you closer to your answer.
52pu
"Drugs are money, money is power, power is security." - Kent Heiner
Nedrow population 2212
Carbon footprint family of 2/11 tonnes of CO2/yr
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