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Hey folks, I posted an issue with my 4100carb yesterday, I was talking to a local guy and he has a 4100 from a 64 t-bird with 1.12 bore. Will this work on my 66 "A" code 289 ?? It needs a rebuild and I have the kit already.

Is the carb the difference between the "A" and the "K" code?? The car is already a Frankenstang, so I am not worried about matching numbers.
 

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The A code 4100 had 1.08 size. The larger engines (390) used the 1.12 and so did the K code hipo. The K code hipo also had a manual choke compared to the automatic choke on the others.

The 1.12 may be too large for your car depending on how modified the engine is.

Is there a reason you cannot just rebuild your 4100?
 

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If you can get it cheap enough, buy it. Whether you use it or sell it, it's a good find. As the other poster said, it will work fine with a a mildly hopped up 289.
 

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It will work on your 289. The 1.08 flows 480 cfm and the 1.12 are closer to 600+ cfm(not sure of the exact number). 1.12 are a dime a dozen, the 1.08's are not. They are worth cash$$$$ so hold on to it. How modified is your engine?
 

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For years I understood and publications listed that as well that K motors used the smaller 480 CFM, even on Shelbys with automatics. But recently everyone is saying the K motors used the 600CFM version. What is correct? I'm inclined to believe the K motor used the 480 CFM carb.
 

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I thought the Ks had the 1.19s, 680 CFM? and are extremely rare? That's what the Pony Carbs history section reads...

I've been studying and just picked up a 65 4100, 1.12" bore, 600 CFM for 82, shipping included.
 
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