Dual Master Brake cylinder to early

1962 - 1965 Mopars

  1. Postman

    Postman Well-Known Member

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    Hello

    I want to change the single Master Brake cylinder in my 62 Dodge Dart, to Dual Master Cylinder.
    Which one will fit best??
    I did this before, on a 65 Plym and used a Master Cyl. of a 67 Dart. Was this only luck, or will they all fit the same and what's def. the best thing??

    (I think I don't have to say, but the Dart got 10" drums all around)
     
  2. Dodge 330

    Dodge 330 Well-Known Member

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    Get a later model one from a truck or rwd car like a Diplomat.

    They're two bolt m/c's but AREngineering sells the adapter for our cars through places like Mancini Racing.

    Ehrenberg from Mopar Action had the whole setup for sale a few months ago on the moparts.com classifieds too.

    Very easy swap.
     
  3. chrisd

    chrisd Well-Known Member

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    So, does the proprtioning valve have to be changed as well?
     
  4. Polara Pat

    Polara Pat Well-Known Member

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    If you're still running drum brakes all around then there is no proportioning valve, just a splitter. Use a union to connect to your rear system and plug that hole in the splitter. Now the splitter just becomes a T to your front system. Make sure that you get a master for a drum brake car. I recommend finding one for a vehicle that has the same size drums as yours, ask your parts guy.
     
  5. Postman

    Postman Well-Known Member

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  6. Polara Pat

    Polara Pat Well-Known Member

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    That looks right and he claims it's nos and not a re-man which is good. Don't forget to keep the plunger from your single pot master. I have had to cut off the old plunger before since they like to stick.
     
    • Thanks! Thanks! x 1
    • Cranky

      Cranky Henchman #1 Staff Member FBBO Gold Member

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      I took one from a 69 Valiant (because I had it) and put it on my 66 Belvedere. The only issue I had was the brake light switch needed to be moved a bit. The cylinder bore was 1/16" smaller than the single MS so my pedal travel was a bit more.
       
    • SUPERSTOCKRACER

      SUPERSTOCKRACER Well-Known Member

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      i like rich ehrenberg's units with the 4 hole adapter plate. its like $65.00
      google him.
       
    • Postman

      Postman Well-Known Member

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      Thank you very much!!!
      That was really helpfull!!!
      :)
       
    • Stumper

      Stumper Well-Known Member

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      What I have on my 62' (drums all around) is an OEM from a 69 Belvedere and it works fine. The rear runs off the front resevoir - front off the rear. No prrportioning valve.
      The OEM cross references to a Dorman M71258 (Summit #DHB-M71258) and Wagner Lockheed 71258-EL-13-780.
       
    • Postman

      Postman Well-Known Member

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      @Stumper
      Thank you, That's great!!
      I have to get a second one, 'cause a friend with a 63 Polara want's me to do the same swap!!

      Thank you!!!
       
    • kikgas01

      kikgas01 Well-Known Member

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      I`m gonna do it to my 63. I am using a 68 one that still has a bolt to get the cap off like it did in 1963. That is if no one buys it soon.
       
    • mrkinger

      mrkinger Well-Known Member

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      Hi ,im working on the same project.My 65 Belvedere has power asist drum brakes .single master cylinder .I want to change it to a dual .I have a master from a 69 dart which had drum power asist brakes,(dual)Can i make this work for my car.One more question.if you dont use a proportioning valve were is the benefit ,if you blow a line wont you lose all the brake fluid ,im not sure on this,any help will be appreciated .
      Thanks
      Paul
       
    • Stumper

      Stumper Well-Known Member

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      Here is the one I run with. It gives me a good firm peddle and the brakes seem to pull straight. Actual stopping ability still sucks though, with the drum brakes and a motor that idles at 1500 rpm.... :)

      SDC10127.jpg
       
    • mrkinger

      mrkinger Well-Known Member

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      Thats great help ,thanks alot ,that is the same master cylinder i have on my bench .I still have the poly in it so i dont go fast ,so it stops okay for me
      Paul
       
    • Cranky

      Cranky Henchman #1 Staff Member FBBO Gold Member

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      What brand of linings are you using on it?
       
    • mrkinger

      mrkinger Well-Known Member

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      To be honest ,i really dont know ,they were on the car when i bought it .Id like to have disc brakes one day ,there is a complete setup on ebay $500.00 ,it includes everything even a new booster.
      Paul
       
    • Dodge 330

      Dodge 330 Well-Known Member

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      You can piece together a pretty cheap disc setup if you're willing to do some hunting.

      A-body disc frontends are a bolt in swap.

      I went with the Wilwood setup. It's really light with aluminum hubs and it bolts to the drum spindle. Ran me right at $680.00 for hubs, rotors, calipers, pads, adapters and bolts.
       
    • 69 Runner

      69 Runner ADMIN wif a corner office (Deceased - RIP)

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      THE cheapest disc setup is the scarebird. Basically they just sell you caliper brackets and a list of parts (GM) available at any parts store. You can do four wheel disc for around $600 going that way
       
    • mrkinger

      mrkinger Well-Known Member

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      Thanks for the help ,to close to Chritmas to do it now ,but in the future.$600 is a good deal
      Paul
       
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