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Technical No stamps on 64 389 block????

Discussion in 'The Hokey Ass Message Board' started by Death by Pontiac, May 25, 2020.

  1. cant seem to find any stamps. any suggestions?
    IMG_1057.jpg IMG_1058.jpg
    31hotrodguy likes this.
  2. flamedabone
    Joined: Aug 3, 2001
    Posts: 4,899


    Early blocks are in this spot.


    Later blocks are here.


    kidcampbell71 likes this.
  3. flamedabone
    Joined: Aug 3, 2001
    Posts: 4,899


    kidcampbell71 and 31hotrodguy like this.
  4. RmK57
    Joined: Dec 31, 2008
    Posts: 1,675


    Service block?

  5. squirrel
    Joined: Sep 23, 2004
    Posts: 47,955


    G 21 4 pretty sure Pontiac and Chevy used the same date code system, so that would be July 21, 1964 casting date. At least the year is right.
  6. Advice from me is not always as reliable as advice from a priest but I am gonna throw this out there anyway. If it were mine I may be inclined to snag myself a set of dies and out any numbers and letters and symbols in it that made me happy.
  7. lostone
    Joined: Oct 13, 2013
    Posts: 1,537

    from kansas

    The numbers are there, they are just where flamedabone said.

    Just need to go down 4 or 5 more inches.
  8. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 8,685


    Some good reference material I came across a while ago,....all Pontiac blocks have a hydraulic lifter valley pan. That simply means that the intake is not sealed to the lifter valley, allowing you to remove the intake while the engine remains sealed. The distributor is located at the rear of the motor and can remain installed when the intake is removed. This is where you will find your first clue of the engine’s age. Appears road draft tubes were phased out in 1960 and replaced by PCV system...
    • If the valley pan has the PCV port at the rear, the block is from 1966 or older, and
    • If the PCV port is at the front, it is 1967 and newer. Of course, the valley can be easily changed or missing, so you’ll need to pry further.
    Pontiac blocks have different freeze-plug configurations:-
    • 1955–66 blocks have 2 (two) freeze plugs; and
    • 1967–78 blocks have 3 (three) freeze plugs.
    1. pontiac camshaft&f=false

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