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Carb Identification on my 312 Y-block Thunderbird

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Old Jun 9, 2026 | 06:30 AM
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Carb Identification on my 312 Y-block Thunderbird

Hey guys, Can you verify this carb for me. I have two AI bots telling me different things.
They can be so confidently wrong.
It stumbles for a second when I start from a stop. Any suggestions to fix?




 
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Old Jun 9, 2026 | 07:22 AM
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Looks like a Holley 4000. Not sure which specific variant.

As for a stumble, a good place to start would be the accelerator pump.
 
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Old Jun 9, 2026 | 07:36 AM
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Carburetor ?

There is a web site if you google 1956 FORD Thunderbird carburetor. The 312 came out in 57 and used a 4150 style Holley carburetor. If your engine is originality should be a 292.
 
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Old Jun 9, 2026 | 07:40 AM
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It is not a Holey 4150, that is for sure as they look completely different!
 
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Old Jun 9, 2026 | 08:28 AM
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Originally Posted by kenny nunez
There is a web site if you google 1956 FORD Thunderbird carburetor. The 312 came out in 57 and used a 4150 style Holley carburetor. If your engine is originality should be a 292.
That could be. I thought my vin lookup said 312, but you could be right. I will need to double check.
 
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Old Jun 9, 2026 | 08:38 AM
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Now wait a minute, Joe! Did you buy an old T-bird? How did I miss that? If it's yours and not a friends, we need pictures. Even if it is not yours we need pictures!
 
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Old Jun 9, 2026 | 10:17 AM
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Originally Posted by abe
Now wait a minute, Joe! Did you buy an old T-bird? How did I miss that? If it's yours and not a friends, we need pictures. Even if it is not yours we need pictures!
lol yep. Bought it last week it’s a 56. I have wanted one of about 30 years. Of course a truck was first priority.

i need to name her and figure out vanity plates. Any suggestions?




 
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Old Jun 9, 2026 | 10:35 AM
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Ahhh! A real 56 T-Bird! Can you share the data plate and VIN? With that I and/or others can find which 4000 variant it is.
 
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Old Jun 9, 2026 | 10:41 AM
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Originally Posted by Harrier
i need to name her and figure out vanity plates. Any suggestions?
Well, let's see, a black 'bird, that can only be one thing, the Old Crow.
 
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Old Jun 9, 2026 | 11:25 AM
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Old Jun 9, 2026 | 12:10 PM
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That would suggest The Holly R-1164 (Ford ECJ) family of the Holley 4000.
 
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Old Jun 9, 2026 | 12:14 PM
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So you've been holding out on us!

That is a nice looking T-bird! A removable hard top and an interior cover. Nice.

Auto or standard? Will your wife drive it?
 
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Old Jun 9, 2026 | 02:19 PM
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Plate

TUX E DOH!

Like the tonneau cover for the interior.

agree on holley 'teapot' but i have no working knowledge of them... Know for sure not a standard ( common) holley.
fellow near me has a 56 long roof with a fenton 2x4 intake and uses teapots, runs dang good...

 
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Old Jun 9, 2026 | 03:50 PM
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Well I did just by it a week ago today. It is an automatic. Gwen does like riding in it. Not sure if she will drive it. I don't know if her feet will reach the pedals.
It would have been nice to have a soft top as well, but it will just take more trip planning.
I was driving it home, about 20 miles, and on a gradual uphill I tested it a little and got up to 83 going uphill. That was enough for the moment. The speedometer is off. I need to see how much it is off. It doesn't look like a rear end change type of off (I have the math for that on my truck)

I need to look into a Thunderbird forum, but I'm afraid they might be a little too uppity for me. I figure you all know far more about what I need help on than anyone on another forum.
I don't plan on upgrades or anything special. I just want to keep it running and stopping well.
 
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