70 Gs 455 4 Speed

Discussion in 'Cars and Parts For Sale Leads' started by slamjob, Sep 25, 2010.

  1. slamjob

    slamjob Well-Known Member

    slamjob, Sep 25, 2010
    #1
  2. 70 gsconvt

    70 gsconvt Silver Level contributor

    Ad says it has an M21 trans. I thouht all the GS's had M20's.
     
    70 gsconvt, Sep 25, 2010
    #2
  3. CJay

    CJay Supercar owner Staff Member

    Mine has a 21. The RPO code on the build sheet was M20 even if it came with an M21
     
    CJay, Sep 25, 2010
    #3
  4. Rich Johns

    Rich Johns Platinum Level Contributor

    All Buick GS Cars big and small block recieved M21 Close ratio trans even though order sheets indicate M20.
    Confusing to say the least.
     
    Rich Johns, Sep 26, 2010
    #4

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