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Undy ... have you looked at the Holley 1850 List carbs ? They are supposed to be the aftermarket equivalent of the ones you are looking for . I`m running two of them on my 427 S/0 in my Galaxie as I was too cheap to pay the price for the originals . Mine are vacuum secondaries and highly modified by Competition Fuel in Tucson ... flow about 660 cfm each according to Competition`s flow bench .
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