1957 Buick Special 46R Positraction ?

Discussion in 'High Tech for Old Iron' started by gooch, Jun 13, 2018.

  1. gooch

    gooch New Member

    I want to apologize ahead of time if this question has already been asked but I'm currently rebuilding a '57 Special with a manual trans and mating it to a '66 425 (old 364 block cracked) and to help it hook up I'd like to know if there is a bolt in "positraction" rear differential that would work.

    In some of the early Chevy's I know that they were easily identifiable with the large "P" cast into it. Are these interchangable or is there another option

    Any help would be appreciated.

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