Heads, what are these ?

Small Block Mopar Engine

  1. MAPS

    MAPS FABO Gold Member FABO Gold Member

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    Can someone please tell me what kind of heads are these ?

    3418916G
    These are the numbers on the head.

    Thanks
     
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    • MOPAROFFICIAL

      MOPAROFFICIAL Well-Known Member

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      Should be a 5 at the end.
      J head, 360
       
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      • MAPS

        MAPS FABO Gold Member FABO Gold Member

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        Right, it's a 5 at the end.
        So you are telling me these are 360 heads, not 340 ?
        These are the heads that were on Ed Hamburger's car. Strange.
        Then again I think he ran 360s also.
        This is a picture of the heads. 155A3393-2C35-4A1E-A905-327AF53E8256.jpeg
        Thanks.
         
      • perfacar

        perfacar Well-Known Member

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        the 71 340 use3d the 915 head with 2.02 valves , 360 used same casting with 1.88 valves.
         
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        • MOPAROFFICIAL

          MOPAROFFICIAL Well-Known Member

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          They could be 340, if they're 2.02...but 'usually' those heads were -A or -F at the end of the number. I'll also add that they were introduced the same year the 360 came out so production started in '70 I believe for the '71 release of the 360 and of course those castings were machine for 340s too.
          Yours are the ta version , or it looks like ..
           
          Last edited: Oct 1, 2020
        • 66fs

          66fs FABO Gold Member FABO Gold Member

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          Possibly 71-72 340. Never took letters into account.
           
        • Locomotion

          Locomotion Well-Known Member

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          Looks like they were epoxied to port and the pushrod holes relocated for T/A or W-2 rockers. Real T/A heads were 915 also, but there were some 894 castings machined for T/A rockers early on.
           
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          • cudamark

            cudamark FABO Gold Member FABO Gold Member

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            That casting was used from '70 through '72 on 340 4bbl, 6bbl. and 360 engines. The machining was different depending on actual application. The letter cast into the head after the number indicates early and late castings. A would be first year, G was much later. Not sure the exact breakdown of letter to year/month, but, it gives you an idea. I don't remember seeing a letter higher than a G, so, I would guess it's a late '72 casting.
             
          • moparmarks

            moparmarks zippindippintie FABO Gold Member

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            Actually into 73 on the 360. Probably used up last years stock. My early built 73 W200 360 that my dad bought new has them. 1.88 of course.
             
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            • cudamark

              cudamark FABO Gold Member FABO Gold Member

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              Sure, castings didn't end at a model year or calendar year. There's almost always a spillover.
               
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              • MAPS

                MAPS FABO Gold Member FABO Gold Member

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                Ok what I know is they have headers that are fitting on to 340 heads so this was one reason they ere thought to be 340.

                @Locomotion
                As for the pushrod work, you are dead on as they are not straight like the stock heads, there was extensive work done on the heads, I would assume by Mr Hamburger himself, as they are similar to the T/A head set up.

                Thanks again guys.
                 
              • Michael Frick

                Michael Frick Member

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                Interesting stuff. When I bought these originally the speed shop owner said they originally went for $3000. But when the W2's came out there wasn't a market for the Hamburger heads. He sold them to me for $1500. Fast forward 35 plus years, kids, houses, etc etc and here they are lol. Going back to a more stock setup for the street and passing on the bracket racing days.
                 
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                • MAPS

                  MAPS FABO Gold Member FABO Gold Member

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                  @Michael Frick
                  Fast fwd another cpl of months and they should be on another 340 and running properly. lol
                  Times are a changing....

                  MAPS
                   
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                  • dibbons

                    dibbons Well-Known Member

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                    Isn't the other number "03100" a date code of some kind? I don't know for sure.
                     
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