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BB Pulleys

960 Views 3 Replies 3 Participants Last post by  bigfish45
Does anyone know what the difference is between a BB long water pump pulley P/N 3932402-UD and 3932402-DU? I'm seeing both on eBay but no specifics. I need a correct water pump pulley to go with my 3955290 crank pulley and my 3770509 power steering pulley on a 396.
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Could one be an error or a typo? Are these deep groove pulleys from a certain model year? I used to have the numbers for my '69 deep groove pulleys written down but.....
No it's not a typo. I see pictures of both UD and DU stamped numbers on the two different pulleys on eBay. These are not deep groove.
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