Front Shock PN for a 56'? (NAPA)
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If you look on the Monroe website, they have an "e-catalog." The don't list anything for the front for a '56 half ton, but they list part number 32207 for a '55 half ton. I don't recall any differences, but the picture doesn't look correct. Might be worth a call to their tech support line.
Good Luck!
Good Luck!