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Are 379 and 378

Discussion in 'Peterbilt Forum' started by Charmeiser, Apr 29, 2025.

  1. Apr 29, 2025 #1
    Charmeiser

    Charmeiser Bobtail Member

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    Apr 29, 2023
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    I am now the proud owner of a 378 pete that is so close to be able to run, just needs a couple fixes here and there and an inframe.

    To lower the price the guy I got it off of agreed to keep the drive shaft and fuel tank for a project he's working on

    I'm looking to get bigger fuel tanks anyways and know a place to get em. Cheap (neighbors road rig caught fire and he's parting them out cheap)

    However it's a 379. Would a fuel tank from a 379 fit a 378
     
    Charmeiser, Apr 29, 2025
    Charmeiser, Apr 29, 2025
    #1
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  3. Apr 29, 2025 #2
    lester

    lester Midwest's #1 Feed Hauler

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    you'd have to measure. fuel tanks come in different diameters
     
    lester, Apr 29, 2025
    lester, Apr 29, 2025
    #2
    Diesel Dave, blairandgretchen, Charmeiser and 1 other person Thank this.
  4. Apr 29, 2025 #3
    ‘Olhand

    ‘Olhand Cantankerous Crusty

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    They’re virtually the same truck
    The 379 has a longer aluminum hood the 378 was shorter and fiberglass
    But virtually the same truck from windshield back and used same basic undercarriage
     
    ‘Olhand, Apr 29, 2025
    ‘Olhand, Apr 29, 2025
    #3
    Coolbreezin, Bean Jr. and Charmeiser Thank this.
  5. Apr 29, 2025 #4
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    If it’s a different diameter, take the straps and mounting brackets with it.
     
    Diesel Dave, Apr 29, 2025
    Diesel Dave, Apr 29, 2025
    #4
    RockinChair, Bean Jr., Sons Hero and 1 other person Thank this.
  7. May 4, 2025 #5
    SmallPackage

    SmallPackage Road Train Member

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    Marion Texas
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    26” diameter is the standard size for 9out of 10 conventional Petes. Other dia’s were optional. Cabovers used 28” and 30”. Lengths in the 26” tanks vary with capacities but they used the same mounts, and straps.
     
    SmallPackage, May 4, 2025
    SmallPackage, May 4, 2025
    #5
    RockinChair, Diesel Dave and Bean Jr. Thank this.
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