Help locating GVWR, etc for 79 K20

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Originally Posted by KIILew

Later edit – another thought occurs to me, although I presently don’t have access to my data or parts books to confirm it. I believe that the K10 used a 52” rear leaf spring (2,000 lb capacity), while the C20 (and C10/Big 10) 2,000 capacity spring was a 56” unit. Since the shorter 4x4 spring was less flexible it used fewer leaves than the longer 4x2 spring (6 leaves vs. 8?). That could also account for the appearance difference.
Just some possible explanations!
Ken Lewis

I believe this is true Ken. I had previously purchased a set of 4" lift springs for the K10 and the common question was 52 or 56 " springs? I have the 52's and was never able to find 56" on any of my model years that I saw in the Jyards.
Tony