Technical Can any one identify this carburetor?

Been organizing the shelves, don't know what this fits. I know this is the place to ask

Thank You

Norb

 

Motorcraft

 

Thank You, any idea of the cfm or what engine they were on, like maybe a Y block?

 

Late 60's thru the 70's up until TB injection took over.

 

I would look at Continentals , 70's even 80's had that carb. 428/460 engines. I am not a Ford expert by any means. Most I came across had 2bbl on them. Y blocks from what I know ( which is little ) had Autolite 4 bbl.

 

Thank You

 

likely an Autolite 4300A, made from 67-74. Not much demand for them these days...but you might get a little for it on ebay.

 

Thanks Jim

 

There’s a flat spot on the side of one of the mounting flange that has letters stamped in it. What are those letters?


Sent from my iPhone using H.A.M.B. View attachment 4617798

 

Like said, this was Ford’s last four barrel carb, aimed at lower emissions and better fuel mileage. It seem to accomplish it somewhat and was a lot more complicated that it’s predecessor. My Dads 1974 F250 had one on it. It worked good new. With a 460, dogged off convertor and the highest gears in a 3/4 ton truck, I ever saw,it got 16mpg when new!








Bones

 

Got one of them on my 74 Mark 4 460.

 

Sorry Uncle Buck, could not find any number or flat for stamping any where on the base plate.

 

Smog carb, good for a dusty garage shelf.
-Dave

 

Like this



Sent from my iPhone using H.A.M.B.

 

Probably had a tag on it at one time.

Also note that this is the earlier version, before they made it into a spread bore design.

 

Looking at your picture in the first post of it upside down, it should be on th side of the lower left mounting hole. The tag on top looks to have the info broken off in your second picture


Sent from my iPhone using H.A.M.B.

 

Yup, that area is blank on this one, the number must have been on the tag.

 

May have been a service replacement part. I try to avoid buying carburetors without their original tag still intact.
-Dave

 

Good eye! I missed that! Actually saw the old pattern, forgot they made a spread bore later!







Bones

 

I think the spread bore version was labeled 4300D.

 

yes, and later the 4350

 

I think AMC borrowed a similar carb from fomoco too.

 

AMC never missed out on borrowing a bad design from someone else

 

FWIW.
All of the 4300 series carbs were spread bore.

Trans Dapt 2199 adpater for the square bores on a 4300/4350 intake.
https://www.hedman.com/product-detail/2199

There are three different 4300s and a final 4350 found on EGR 460s of the late 70s.

4300A 441 CFM

• 1" primary venturi
• Primary throttle bore: 1-7/16"
• Secondary throttle bore: 1-9/16"

4300A 600 CFM

• 1.25" primary venturi
• Primary throttle bore: 1-9/16"
• Secondary throttle bore: 1-11/16"

4300D/4350 715 CFM

• 1.25" primary venturi
• Primary throttle bore: 1-9/16"
• Secondary throttle bore: 2"

 

No...

All of them had different size primary and secondary bore sizes, but only the 4350 had the secondary bores spaced apart. That's what the "spread" means.

 

Yes, I worked for AMC back in those years. Both Jeep and AMC cars used that carb.They actually worked pretty well ... when they were new.

 

I’m not sure who they borrowed the 258 from but that is a very reliable engine. Had a few jeeps with that six that I abused regularly without a hitch.
The AMC rear diff. is another story altogether.

 

AMC 258 was their own engine. A very solid inline 6.