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Don't ask me why but most of us refer to that tranny as the SM465 when it is actually the CH465. I don't know what the CH stands for. It is listed in the Chevrolet Restoration packet as the Chevrolet CH465. I have never heard of the SM420 being called an CH420.
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1970 Blazer with a 400 sbc and 4" lift
1980 Pontiac Trans Am, 455 Oldsmobile
2012 Kawasaki Concours 14
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