481x or Keith Black block

Discussion in 'PSI Superchargers Tech Questions' started by general23cmp, Apr 9, 2004.

  1. general23cmp

    general23cmp New Member

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    What are the primary differences in these two types of blocks? Which would you recommended for ProMod use (or another type if you would recommend it)? If I understand correctly, they are both hemi's, but different. Can anyone elaborate?

    -Thanks
     
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  2. NITROITCH

    NITROITCH New Member

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    481 is a chevy based(as per chrank shaft design)
    Keith Black, typically is a Chrysler hemi design,
    however TFX builds both as well as Donovan. fyi warren d
     
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