XXXXXXX = 1972 - 1979 454 cu.in. 270 hpUsed in Corvette, Trucks, Chevelle & Passenger Car
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If there is a Suffix Number located on Passenger Front of Head on Block Pad, please post that info to
XXXXXXX = 1972 thru 1979 454 cu.in. 270 hpUsed in Corvette, Trucks, Chevelle & Passenger Car
XXXXXXXXSW appears to be a Parts ( crate motor) or Rebuild Number as that does not appear in any of my Chevrolet info