Block Identity, XXX below heads, what is it

Discussion in 'Fox 5.0 Mustang Tech' started by IndyBlk5.0, Dec 15, 2003.


  1. IndyBlk5.0

    IndyBlk5.0 New Member

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    what block is this? trying to figure out if it is stock, i bought this car wiht many upgrades but takening it apart to find out what it has. below the heads where the lower intake would be is stamped XXX
  2. Black331Stang

    Black331Stang Active Member

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    hmm..the only thing on mine is the number 13 i beleive..and thats right below the drivers side Head. see if u have a # there..my friends says 21 so i dunno what it is
  3. Fastime331

    Fastime331 Founding Member

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    It's a stock block
  4. IndyBlk5.0

    IndyBlk5.0 New Member

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    this is weird,
    i have my lower intake off and where the pushrods and stuff goes though there on the block, not the heads, is XXX... no numbers or anything but its on both sides. anyone know?
  5. IndyBlk5.0

    IndyBlk5.0 New Member

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    thanks :nice:
  6. Black331Stang

    Black331Stang Active Member

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    oops yeah my number was on teh heads
  7. Fastime331

    Fastime331 Founding Member

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  8. Mike86Stang

    Mike86Stang Advanced Member

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    You have the **** star special edition ;) :nice: :rlaugh:

    No seriously though I think most roller 5.0's have the XXX stamp in the lifter valley.
  9. the pony boy

    the pony boy Founding Member

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    the explorer block i have in the garage has the xxx on it also it was from a 97.if it helps any
  10. Mustang5L5

    Mustang5L5 Car used in adult film "Highway Gangbang-InDaButt" SN Certified Technician Founding Member

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    Stock 5.0 HO blocks are designated with XXX or YYY in the lifter valley.

    But really it means you got the XXX-rated **** edition block
  11. Pyro85GT

    Pyro85GT Fire? What fire?

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    hehe thats what i thought at first when i picked up an 88 block for my little project. but come to find out most stock blocks had XXX on them and i noticed some of the blocks they use in MM&FF for projects have teh same markings
  12. IndyBlk5.0

    IndyBlk5.0 New Member

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    thats what i was afraid of mstang! and only you would think of something like that ! we all know where your mind is!!! :shrug: .. thanks for the completely illrevelant and quite frankly useless advice!!! :bs: :hail2: :owned: :banana: heheheh :D :rlaugh: :lol:
  13. nojuice

    nojuice Founding Member

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    I think the actual block casting #s are located at the back of the block,near the bottom, on the webbing that the bell housing bolts to.If I recall correctly, it will be on the passengers side.
    Scott
  14. BelueLX

    BelueLX Founding Member

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    what do the numbers on the corner of the head mean (like the drivers side front) ? just production numbers? mine say 24 does that mean use autolite 24 plugs :banana:
  15. IndyBlk5.0

    IndyBlk5.0 New Member

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    numbers on heads vary, more than likely they are stock e7 heads. You can use any plug you like
  16. nojuice

    nojuice Founding Member

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    The #s on the corner are likely just casting #s,just to let the manufacturer know which mold the heads were cast in.
    Scott

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