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Re: 1965 Chevy C20 ID
SM420 here are pics https://www.google.com/search?q=sm42...w&ved=0CC8QsAQ was used in trucks up to C60 at least.... i have a C60 (63) and it has same trans as my C20 also (63) i also have 52 and 56 with same trans .....it was replaced in 68 with SM465
Last edited by jtrichard; 11-27-2014 at 07:10 PM.
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