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  1. 7

    Front & Rear Leaf Springs for C and K Models

    So my stock 77 K10 has 2 up front and 6 out back. Is this standard? I don't see any RPO codes for heavy duty on my truck. What's standard for a K20?
  2. 7

    Any easy way to find my RPO codes?

    Man this is great info! Thanks!

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