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Old 12-23-2011, 05:35 PM   #4
Mike C
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Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,714
Re: C10/C20 K10/K20 Frame Interchangeability

If you want to just "swap" there are lots of differences. 2x4 has different spring hangers for the leafs (if it is a leaf truck, 2 1/4" wide on most 2x4, but Longhorn has 2 1/2" and they are shorter than 4x4 height wise). 42.5" spring centers if it is a 2x4 and 40" if it is a 4x4. You can make a 2x4 a 4x4, but it is not just a "swap parts" quickie.
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