1. DionR

    DionR Well-Known Member

    Messages:
    2,104
    Likes Received:
    253
    Joined:
    May 7, 2008
    Location:
    Spokane, WA
    Local Time:
    3:53 PM
    Any way to tell an E-68 HP 400 from an E-64 standard 4bbl 400 after the motor has been removed from the car? I know the E-68 had dual exhaust, but without having access to the car it came out of hard to determine that.

    Any external visual clues?

    BTW, carb and air cleaner are missing too.

    Sorry, I should add that it is out of a 1975 Road Runner.

    Thanks!
     
  2. AndyF

    AndyF Well-Known Member

    Messages:
    1,787
    Likes Received:
    1908
    Joined:
    Feb 23, 2009
    Location:
    Oregon
    Local Time:
    3:53 PM
    The HP stamp on the ID pad?
     
  3. DionR

    DionR Well-Known Member

    Messages:
    2,104
    Likes Received:
    253
    Joined:
    May 7, 2008
    Location:
    Spokane, WA
    Local Time:
    3:53 PM
    Thought about that, but wasn’t sure if they were still using it in 75. This one does not say HP on the pad, but it doesn’t have a date or serial number either.

    The data in here says “Late Introduction” for the HP 400 - https://www.hamtramck-historical.co...ataBook/1975/75-Plymouth-engineering_0007.jpg

    Not sure when that would be, the casting date on this motor is either 6/74 or 8/74 (I think it is a 6), but not sure how long a block would sit before use.

    ID pad has 5T400 but no date or serial number I can find, only a big 2 and the cross indicating undersized journals.

    Tried to find a date on the intake, but no luck there either.

    My gut says the car was a late 74 or early 75 build and preceded the introduction of the E-68 motor. But wondered if there were other ways to tell short of finding the cam specs and comparing them to this motor.
     
  4. RustyRatRod

    RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

    Messages:
    64,633
    Likes Received:
    37590
    Joined:
    Jun 7, 2010
    Location:
    Georgia
    Local Time:
    6:53 PM
  5. DionR

    DionR Well-Known Member

    Messages:
    2,104
    Likes Received:
    253
    Joined:
    May 7, 2008
    Location:
    Spokane, WA
    Local Time:
    3:53 PM
    Looks like in 1976 the standard 4bbl 400 (E-64) went to lean burn. That would be a clue on one of those motors.

    This motor has the distributor in it, wonder if the weights/springs and/or vacuum canister would give a clue.
     
  6. oldkimmer

    oldkimmer FABO Gold Member FABO Gold Member

    Messages:
    16,518
    Likes Received:
    4885
    Joined:
    Nov 11, 2006
    Location:
    Kindersley, Saskatchewan,
    Local Time:
    5:53 PM
    5 is for 1975. T is non hp. U is hp. Kim
     
    • Thanks! Thanks! x 1
    • DionR

      DionR Well-Known Member

      Messages:
      2,104
      Likes Received:
      253
      Joined:
      May 7, 2008
      Location:
      Spokane, WA
      Local Time:
      3:53 PM
      Ah man!! You dashed my dreams!

      :lol:

      Thanks for the info.
       
    • A56

      A56 MoParAffliction FABO Gold Member

      Messages:
      1,681
      Likes Received:
      1902
      Joined:
      Jun 24, 2014
      Location:
      South of the Mason-Dixon Line
      Local Time:
      4:53 PM
      Didn't the hp 400 have the forged crank?
       
    • oldkimmer

      oldkimmer FABO Gold Member FABO Gold Member

      Messages:
      16,518
      Likes Received:
      4885
      Joined:
      Nov 11, 2006
      Location:
      Kindersley, Saskatchewan,
      Local Time:
      5:53 PM
      Not unless it’s on a 4 gear. Kim
       
    • RustyRatRod

      RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

      Messages:
      64,633
      Likes Received:
      37590
      Joined:
      Jun 7, 2010
      Location:
      Georgia
      Local Time:
      6:53 PM
      Or in a truck. I had a 77 400 that came out of a truck. Had a beautiful steel crank with 77 date coded bearings.
       
      • Agree Agree x 1
      1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
        By continuing to use this site, you are consenting to our use of cookies.