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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » 1964-1/2 Mustang unibody vs a 1964 Falcon unibody

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    8/05/2025 3:57 PM  #1

    moon4964
    FYI FORD Member

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    Registered: 9/04/2024
    Posts: 52

    1964-1/2 Mustang unibody vs a 1964 Falcon unibody

    Gentlemen, please excuse my ignorance. I own a 1964 Falcon (powered by a 1966 Mustang 289-V8 and mated to my Ford toploader with a MS clutch cable kit) but have been lectured by a car meet acquaintance concerning the subject matter. I have owned a few Falcons and Mustangs and never concerned myself with chassis similarities. I would purchase parts for the particular car on which I was working.
    My question: Was the 1964-1/2 Mustang chassis identical to the Falcon unibody? I have a feeling there will be several responses to my mundane question.
    Sincerely,
    Tom M.

     

    8/06/2025 5:28 PM  #2

    RCodePaul
    FYI Addict

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    From: Fresno CA
    Registered: 10/04/2023
    Posts: 119

    Re: 1964-1/2 Mustang unibody vs a 1964 Falcon unibody

    Nope, the 64 Falcon and 64.5/65/66 Mustang chassis are not identical.
    The Mustang was based on the Falcon underpinnings to a good degree, but the chassis are different dimensionally and in many details. Even though the overall lengths are the same, the Mustang wheelbase is shorter and the chassis is narrower. Many shared bits, but chassis are not identical.  

    65 Fastback, 422W, Roller C4, 14" front discs, 9" rear,  front coilovers, SorT A-arms
     

    8/06/2025 6:31 PM  #3

    tweet66
    FYI FORD Member

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    From: Pennsauken, NJ
    Registered: 4/01/2013
    Posts: 61

    Re: 1964-1/2 Mustang unibody vs a 1964 Falcon unibody

    Weirdly even though the chassis on the mustang is narrower the frame rails are 1" wide apart. When I was converting my 65 to V8 steering linkage I was thinking of using an extra 66 Mustang center link but it's too wide. The tie rods, sleeves, pitman and idler arms are the same but not the main link. I measured my 66 Mustang and the Falcon clearly different.

     

    8/06/2025 9:45 PM  #4

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,661

    Re: 1964-1/2 Mustang unibody vs a 1964 Falcon unibody

    The Falcon also lacks the front lower crossmember that goes under the oil pan. Falcon inner fenders are much taller.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    8/07/2025 11:23 AM  #5

    moon4964
    FYI FORD Member

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    Registered: 9/04/2024
    Posts: 52

    Re: 1964-1/2 Mustang unibody vs a 1964 Falcon unibody

    Great information, gentlemen. I appreciate the detailed answers.
    TM

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  •  »  1964-1/2 Mustang unibody vs a 1964 Falcon unibody

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