If you look up 1960 k20 on auto zones site,you will see the part numbers i gave you.Complain to auto zone for the wrong part numbers listed. Are you sure the shocks you have on the truck are the right ones ? I find it hard to believe that there is nothing available.Somebody has to be able to cross reference part numbers.
Have you tried calling Monroe direct,there site only goes back to 1967 ?

1951 3100 Chevrolet
1951 Chevrolet Suburban Carryall
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