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Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

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Old 11-03-2009, 02:03 PM   #1
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need help i cant identify this holley carb

on the carb it says 83310-1 2125 right under that one side says R81 other says P80. On the base of the carb there are these numbers 12R-4770B. its a 4 barrel. if anyone know what carb this is please let me know. thanks
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Old 11-03-2009, 10:01 PM   #2
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Re: need help i cant identify this holley carb

From what I can find out on the web...it's either a 750 or 780. I am not sure if it's set up as a double pump or dual feed. If it has the jet/fuel plate on the back side it would be a double pump, if not then dual feed.
Either one is a great carb. I used to have a 780 dual feed on my small block 350 that flowed 810 CFM, with only some minor mods.
Look up just the 83310-1 number, and you should be able to find out more info.
Good luck.
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Old 11-04-2009, 10:18 AM   #3
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Re: need help i cant identify this holley carb

www.mortec.com

Has a good listing of Holley carbs and part numbers
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Old 11-04-2009, 01:08 PM   #4
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Quote:
Originally Posted by bestracing View Post
www.mortec.com

Has a good listing of Holley carbs and part numbers
Not very good, actually, as it is sparse with information, and in this case, the information it has is wrong.

Holley's website has a better reference: http://www.holley.com/data/TechServi...%20Listing.pdf

Looks like a 4160 model vacuum secondary 750.

By the way, mrjhett, "dual feed" and "double pumper" are unrelated aspects of Holley carbs. It's either "dual or single feed", and either "double pumper or vacuum secondary".
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Old 11-07-2009, 10:53 PM   #5
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Re: need help i cant identify this holley carb

My bad.... I guess I didn't say what I meant.... Thanks for clarifing.... I know the diff between those...jus didn't say it right lol Let me try now:
The 780 (Vacuum secondary , without the jet plate...jus the float bowl on the backside) was the carb I had...
BTW Thanks for the links, I'm going to save them...even though I'm not currently using carbration anymore....
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Old 11-07-2009, 10:53 PM
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