Converting '70 Muncie from M21 to M20 - NCRS Discussion Boards

Converting '70 Muncie from M21 to M20

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  • Stephen B.
    Very Frequent User
    • March 31, 1988
    • 874

    Converting '70 Muncie from M21 to M20

    My '70 came with a wide ratio M20 transmission that someone changed to a close ratio M-21 gear set. What exactly do I need to convert back to a wide ratio M20? From my research in parts books, etc., it appears that I merely need to change the counter gear set.

    Thanks in advance.
  • Peter M.
    Very Frequent User
    • May 30, 2013
    • 358

    #2
    Re: Converting '70 Muncie from M21 to M20

    Stephen,
    Input gear and cluster. I am doing the same thing on my 67.
    Kind regards

    Comment

    • Stephen B.
      Very Frequent User
      • March 31, 1988
      • 874

      #3
      Re: Converting '70 Muncie from M21 to M20

      Thanks Peter. I have to replace the input shaft anyhow as it has 2 broken teeth.

      Comment

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