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SM420 to 5.3 Vortec?

Discussion in '40- & 55-Series Tech' started by needamod, Mar 11, 2004.

  1. needamod

    needamod

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    I found a decent price on a used 5.3 Vortec out of a '99 GMC half ton. like the SM420 and was wondering if they can be two peas in a pod?
     
  2. woody

    woody unhelpful spotter Staff Member Admin

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    I don't believe they share the same bolt pattern at the block....
     
  3. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

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