68 340 4-speed distributor

Mopar General Discussions

  1. Ceedawg

    Ceedawg Well-Known Member

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    Question popped up if the distributor (cast iron duel point) had a vacuum advance or was just centrifugal?
     
    Last edited: Dec 27, 2020
  2. A56

    A56 MoParAffliction

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    A picture of the distributor would make sense.
     
  3. Professor Fate

    Professor Fate Push the button, Max...

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    Vacuum and centrifugal. If there's no vacuum can, it's not factory.
     
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    • 4spdragtop

      4spdragtop CONGRATS NORTH AMERICA!

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      My 69 340 4spd one does.
       
    • Demonracer

      Demonracer 71 Demon 00 Ram 16 Chrysler 300S 05 Caravan FABO Gold Member

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      Pictures needed, can't see it from my house. LMAO
       
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      • 67Dart273

        67Dart273 FABO Gold Member FABO Gold Member

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        The only non-vacuum ones I'm aware of are some industrial/ marine, and maybe some "race" pieces. Certainly EVERYTHING that was sold through a dealer as a licensed passenger car had vacuum

        Remember---68 was the first year of FEDERAL (not just CA) engine emission controls. GM "did" this with a smog pump. Chrysler "met" the regulations with leaned carbs and modified advance curves, etc etc
         
      • krazykuda

        krazykuda Well-Known Member FABO Gold Member How-To Section Editor

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      • Ceedawg

        Ceedawg Well-Known Member

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        My thoughts they were all vacuum too, this guy insisted his 68 Dart 340 came with a non vacuum one.
         
      • Ceedawg

        Ceedawg Well-Known Member

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        There is no picture
         
      • Professor Fate

        Professor Fate Push the button, Max...

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        He may have gotten it that way, but from the factory the Prestolite dual points were vacuum and centrifugal.
        Hustle Stuff/Direct Connection may have offered a strictly centrifugal version, but it wasn't used on the assembly line.
         
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        • A56

          A56 MoParAffliction

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          Never happen from the factory. My dad had a brand new '68 Formula S 340 and the dual point in that had vacuum advance. My brand new '69 cuda 340 4 speed had a dual point with vacuum advance. My present '69 4 speed cuda 340 with the original motor has it's original dual point with vacuum advance. Your friend is mistaken.
           
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          • Ceedawg

            Ceedawg Well-Known Member

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            Was the 68 a 4speed?
             
          • A56

            A56 MoParAffliction

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            No console automatic
             
          • Ceedawg

            Ceedawg Well-Known Member

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            He’s saying 68 4 speed one year only
             
          • A56

            A56 MoParAffliction

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            Did he buy the car new?
             
          • 4spdragtop

            4spdragtop CONGRATS NORTH AMERICA!

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            • 3rdLM23P9

              3rdLM23P9 FABO Gold Member FABO Gold Member

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              Steve, I do still have the distributor I got from you - just have to find it. It is in storage with the cars, but I should be able to check it in the next few days. Once I locate, will send photo.
               
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              • lemondana

                lemondana BlackDart

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                Every factory cast iron dual point I have ever seen has the vacuum advance on it.
                 
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                • Ceedawg

                  Ceedawg Well-Known Member

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                  I had a 68 GTS 340 auto but for the life of me I can’t remember if it was duel or single (aluminum) bought it used in 70
                   
                • toolmanmike

                  toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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                  Nope! They all had vacuum from the factory.
                   
                  Last edited: Dec 27, 2020
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                  • Professor Fate

                    Professor Fate Push the button, Max...

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                    Probably single point. Out of the four '68 GTSs I've had, only the 340 four speeds were dual point (with vacuum advance, BTW). The 340 automatic and 383 automatic were both singles. Seemed odd to me at the time, but all are/were original cars acquired years ago- I've read various spec sheets and road tests supporting this, too.
                     
                    Last edited: Dec 27, 2020
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                    • autoxcuda

                      autoxcuda Well-Known Member

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                      he doesn’t know what he is talking about. I’m pretty sure all Mopar cars from early 60’s to mid 70’s had vacuum advance

                      On a positive note.... you now know to 2nd guess and/or doubt any advice from this person in future :thumbsup:

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                      C2BC0AD7-3092-432C-9E7C-BF1AA8F21B25.jpeg
                       
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                      • halifaxhops

                        halifaxhops It's going to get stupid around here! FABO Gold Member

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                        All factory 4 speeds that year had Vac advance now some MP/DC came with just mechanical to be added on by the owner or dealer.
                         
                      • autoxcuda

                        autoxcuda Well-Known Member

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                        I think the only 60’s and newer carburetored production Mopars without vacuum advance would be boats, and/or industrial motors. ???

                        I even think there was a lean burn motor with two vacuum advance modules.
                         
                      • halifaxhops

                        halifaxhops It's going to get stupid around here! FABO Gold Member

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                        Mostly. Lean burn was strange could have one one the distributor and also the control box or just the control box, they also had dual pickups. I wont rebuild them, way to many variables and almost no info on the proper specs easily available.
                         
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