my 78 f250 has made a very long journey and its almost reached the end

Discussion in 'Ford Truck Builds' started by Preston, Sep 6, 2022.

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  1. Preston

    the remaining parts are a 400m 6.6 liter engine for the truck to actually work


    if any of yall have one ill offer to buy
     
    Preston, Sep 6, 2022
    #1
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  2. FTZ HAIC Staff Member Oregon Chapter Founding Member

    I don't have one, but a couple of notes:

    - The 400 has never been called a 400M. Ford has always simply called it "400". The 351M uses the M to distinguish it from the 351C and 351W.

    - Get a 1975+ version if you plan on keeping it stock. If you get an early one, the compression is higher and it has more problems with pinging/detonation unless you run premium fuel.
     
    FTZ HAIC, Sep 6, 2022
    #2

  3. Preston

    i miss typed it but thanks for the info
     
    Preston, Sep 6, 2022
    #3

  4. Preston

    also how do i tell if its a 351W or a 351C
     
    Preston, Sep 6, 2022
    #4

  5. FTZ HAIC Staff Member Oregon Chapter Founding Member

    351W - Each valve cover will have 6 bolts. Transmission bell housing will have a small block pattern. Radiator hose is on the intake manifold.

    351M and 351C - Radiator hose fitting sticks straight up from the top of the block. Valve covers use 8 bolts.

    Telling a 351M from a 351C:
    351C Transmission bell housing uses the small block pattern (like a 351W does). Motor mounts use 2 bolts.
    351M Transmission bell housing uses the big block pattern. Motor mounts use 3 bolts.

    pattern.png #ad
     
    FTZ HAIC, Sep 6, 2022
    #5

  6. Preston

    thank you !
     
    Preston, Sep 6, 2022
    #6

  7. Preston

    its a 351c or m because it has 8 bolts on the covers
     
    Preston, Sep 6, 2022
    #7

  8. Preston

    do you have one of these engines that i can buy ?
     
    Preston, Sep 6, 2022
    #8

  9. Preston

    or know links where i can find them
     
    Preston, Sep 6, 2022
    #9

  10. Preston

    i think its a modifyed
     
    Preston, Sep 7, 2022
    #10

  11. FTZ HAIC Staff Member Oregon Chapter Founding Member

    Yeah, I thought it would be. The 351C was never in that model truck from the factory so it would have to be swap.
     
    FTZ HAIC, Sep 7, 2022
    #11
    Preston likes this.

  12. Preston

    yeah thanks
     
    Preston, Sep 7, 2022
    #12
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