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Old 05-17-2004, 09:42 AM
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Holley carb model number?

I got a donor motor (a GM 427) w/ an old Holley carb on it.
I was curious what the cfm's on this carb are and can't seem to come up with any information on it.
It says it's a model 4773-1.

Anyone know?

Thanks
-B.

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Old 05-17-2004, 11:13 AM
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Holley Carb

You can go to www.holley.com and the information should be there. Holley also has a tech support line that can help you with any question you have on the carb.
hope this helps
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Old 05-17-2004, 09:54 PM
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i looked it up but the closest i could find is either 4776 which 600 cfm or 4778 which is 700 cfm (more likely) were the numbers obscure? both of these are mech sec carbs. it seems that the lower the last digit, the smaller the cfm. the 4778 has 1 5/16 primaries and the 4779 has 1 3/8" primaries. I am quoting out of abook on holley carbs by dave emanuel.
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