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  #1 (permalink)  
Old 09-01-2016, 12:33 PM
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Default Holly 4 bbl ID

I have a 4 bbl Holly. How do I find out which one is is and size?
Thanks
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Old 09-01-2016, 02:00 PM
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Easiest way is to look at the list number. Most types of 4bbl Holleys have them on the front of the airhorn (where the choke butterfly is) when you take off the air cleaner. Come back here with that number, or google it.

1850... 80451... 3310... 80508... 4776... 4777... 4778... 4779... 4780... 4781...
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Old 09-01-2016, 04:51 PM
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Quote:
Originally Posted by jtubbs View Post
I have a 4 bbl Holly. How do I find out which one is is and size?
Thanks
Holley has a PDF on their site that lists all the carb numbers - it s/b stamped or printed on the outside of the air horn. Then just look up the carb number on this document: http://documents.holley.com/techlibr...al_listing.pdf
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Old 09-02-2016, 02:03 AM
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Of course, as some of us know, that only works if it has a choke tower.

If it has been milled off already, and the list number piece wasn't kept, then there are other ways to determine what the carb is.
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