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Thread: Carb question

  1. #1
    Fresh Catch jlarson's Avatar
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    Carb question

    I have an 89 4.2...im wanting to change to the motorcraft carb...i have one that i think came off a 360...looks like a 3 barrel...the side is marked with 1.21...another is marked 1.23..question is....can i use either of them...maybe change the jets or something???20180311_164258.jpg 20180305_162836.jpg

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  2. #2
    Fresh Catch jlarson's Avatar
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    I guess not

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  3. #3
    Been Around the Block
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    a/s/l?


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  4. #4
    Knows a Thing or Two BABOOZLE's Avatar
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    It depends on the CFM. If they are both 2 barrels then they are probably similar. The 360 is larger so it might be slightly bigger. You won’t know the CFM until you look up the part numbers on the inter webs. Are the base plates the same? If the new one bolts onto the manifold and the butterflies cycle freely then you may be able to pull it off. Won’t know until you try.


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  5. #5
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    Motorcraft

    Many people use the 1.21. I put a 1.53 on my 4.2. Check the jets you my be ok. If it is off of a 360 engine you will probably have to change them to a smaller size. There is a web sight I believe is called Mikes Carburetor. There is a wealth of information there. There is contact information there as well. That is who I got my Jets from.
    Last edited by Tuggin; 04-09-2018 at 10:08 AM.

  6. #6
    Fresh Catch jlarson's Avatar
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    Thank you

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