3888883 Head casting # - NCRS Discussion Boards

3888883 Head casting #

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  • Joel A.
    Very Frequent User
    • September 30, 1997
    • 214
    #1

    3888883 Head casting #

    Anyone tell me(for sure) what the heck these heads were for originally? Pretty sure they weren't OE on a '79 L82.... Some folks are insisting they are 400 heads, but I can't see 400 heads working on a 350(ZBA code), considering the steam holes. Here's the nums from the heads. GM 42 3888883 D2 42 Thanx!
    Last edited by Joel A.; February 28, 2014, 11:04 PM.
    Joel Adams
    1974 Coupe
    1985 Coupe
    "I know the voices aren't real...but sometimes they have some really kewl ideas...."
    Tags: None
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    • William C.
      NCRS Past President
      • May 31, 1975
      • 6037
      #2
      Re: 3888883 Head casting #

      checked three different interchange manuals without finding that casting number. What is casting date and could you recheck the casting number?
      Bill Clupper #618
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        • Michael W.
          Expired
          • April 1, 1997
          • 4290
          #3
          Re: 3888883 Head casting #

          GM casting numbers 3, 6, 8 or 9 all look very much alike can be easily mistaken for each other.

          I'm going to guess you have a 3998993 and a casting date of D242.
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            • Joel A.
              Very Frequent User
              • September 30, 1997
              • 214
              #4
              Re: 3888883 Head casting #

              They guy SWEARS the casting number is correct....I've been questioning that for a few days, but he insists that it is what is on the heads. I'll try to get him to get a good pic. This is a friend of mine I'm trying to help. We know they're not correct for the car, but he just wants to know what the heck they are. He's planning on a head/cam upgrade, so it really doesn't matter, but it would be nice to know if he tries to sell these.
              Joel Adams
              1974 Coupe
              1985 Coupe
              "I know the voices aren't real...but sometimes they have some really kewl ideas...."
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                • Michael W.
                  Expired
                  • April 1, 1997
                  • 4290
                  #5
                  Re: 3888883 Head casting #

                  Originally posted by Joel Adams (29762)
                  They guy SWEARS the casting number is correct...
                  Yup, just like these. Enlarge the pic and you'll see the confusion.
                  Cnv0683.jpg
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                    • Joe L.
                      Beyond Control Poster
                      • February 1, 1988
                      • 43221
                      #6
                      Re: 3888883 Head casting #

                      Originally posted by Joel Adams (29762)
                      They guy SWEARS the casting number is correct....I've been questioning that for a few days, but he insists that it is what is on the heads. I'll try to get him to get a good pic. This is a friend of mine I'm trying to help. We know they're not correct for the car, but he just wants to know what the heck they are. He's planning on a head/cam upgrade, so it really doesn't matter, but it would be nice to know if he tries to sell these.
                      Joel------


                      Guaranteed he's got the number incorrect. No cylinder heads of that casting number ever existed.
                      In Appreciation of John Hinckley
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                        • Joel A.
                          Very Frequent User
                          • September 30, 1997
                          • 214
                          #7
                          Re: 3888883 Head casting #

                          Kinda what I thought....thanks fellas.
                          Joel Adams
                          1974 Coupe
                          1985 Coupe
                          "I know the voices aren't real...but sometimes they have some really kewl ideas...."
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                            • Joel A.
                              Very Frequent User
                              • September 30, 1997
                              • 214
                              #8
                              Re: 3888883 Head casting #

                              Well...I convinced him to pull the valve covers back off and have another look-see. Boy..is HIS face red! The REAL casting # is 3998993, as was suspected. Mystery solved. He has been properly admonished...lol
                              Thanks guys.
                              Joel Adams
                              1974 Coupe
                              1985 Coupe
                              "I know the voices aren't real...but sometimes they have some really kewl ideas...."
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