What Holley did I buy???
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What Holley did I buy???

  1. #1
    Senior Member johnf's Avatar
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    Default What Holley did I buy???

    Bought this Square bore carb all I know about it Where can I get a number off it just has pro form What carb is it? Can't find it on Holley site. Need to know if it's a small anchor or if it is decent. Thanks johnf

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    gn7
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    Looks to be a 750 made up of Holley parts screwed to an older Proform 750 vacuum secondary body.

    Should work OK. You'll never find anything on it from Holley because all the Holley numbers were stamped on the main body.



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    Senior Member ol guy's Avatar
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    List 3310 holley with an aftermarket body. The L 3310 was a 780 rated carb and great for a all around cruiser carb or mild street deal. There are alot of areas that that carb can be tuned. Vac secondary can, squirtes, and jets! Very under estimated and probably the best carb for learning how to dial in a carb for your'e application!

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    Senior Member johnf's Avatar
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    Quote Originally Posted by ol guy View Post
    List 3310 holley with an aftermarket body. The L 3310 was a 780 rated carb and great for a all around cruiser carb or mild street deal. There are alot of areas that that carb can be tuned. Vac secondary can, squirtes, and jets! Very under estimated and probably the best carb for learning how to dial in a carb for your'e application!
    Thanks guys, Greatly Appriciate all the knowledge and advice!! The guy forgot if it was a 750 or 850. Garaunteeed was new rebuild, Ready to run, or bring it back I paid $200 Thought was a decent deal.

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    gn7
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    Quote Originally Posted by johnf View Post
    Thanks guys, Greatly Appriciate all the knowledge and advice!! The guy forgot if it was a 750 or 850. Garaunteeed was new rebuild, Ready to run, or bring it back I paid $200 Thought was a decent deal.
    Its not a 850! Like Ol guy said, its either a 780, or a 750. Basically the same carb



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    Senior Member ol guy's Avatar
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    Without knowing the application or intended usage their are ALOT of mods you can make to that carb! First off would be a 50cc acc pump and probably a larger squirter in the primary venturies! Also after looking at the carb more it is probably an L-3310-1 . the standard L3310 has a jet plate for the secondaries and the dash 1 or 2 has the metering plate as the pics show! Don't give up on that carb (depending on application) as there are alot-ALOT of areas to tune with that series of carb. Those carbs were used on many factory H/P engines direct from the factory and work better than alot of stuff off the shelf. Keep us posted! alot of guys on this thread know a bit about carbs and are willing to help. Good luck, you have a good starter kit. Again depending on the application.

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