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Thread: 1959-60 Rb 383
          
   
   

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  1. #1
    greymouser7 is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 73,74,76Roadrunner,80Impala,77D300fltbd,
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    1959-60 Rb 383

     



    Anybody know anything about these?
    Four inch bore - 3.75 stroke
    Same basic block as a 440,413, 426 wedge????

  2. #2
    R Pope is offline CHR Member Visit my Photo Gallery
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    Well, they are the tall deck block like a 440, etc., but they haven't got enough wall thickness to bore to the bigger cubes. The crank is the long stroke one like 413's and 426's use. The heads aren't anything to get excited about, either.

  3. #3
    greymouser7 is offline CHR Member Visit my Photo Gallery
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    what is the largest stroke i can run in the block with the 4 inch bores. i picked up a couple of blocks in the consideration of running a 'econo-stroker' motor for my D-300 flatbed...

  4. #4
    Mike P's Avatar
    Mike P is offline CHR Member Visit my Photo Gallery
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    The info Pope provided is right on the money.

    When you start playing with the B and RB Mopars there is no such thing as an 'econo-stroker'. Besides the cost of any custom stroker crank, your also looking at pistons for a one year only engine (although with the fairly common 4" bore size and.playing wiht overbores you MIGHT find something with a wrist pin location that would work.

    If you truely looking at building a "econo" motor I would look for a 413 which seemed to be a "magic number " for making torque for Chrysler and were used in Motor Homes and large trucks well past their replacement in passenger cars.
    I've NEVER seen a car come from the factory that couldn't be improved.....

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