VIN Number Decoding and Schematic Help

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Hey guys. I've got a 79 C10 shortbed and I need help decoding the VIN. I tried the VIN decoding tool on this site, but it's not working on my end for some reason. The VIN is CCU149F492801. Any help will be much appreciated. My Daughter and I are restoring this truck, and I just want to know what version of the C10 it is. Also, does anybody have any complete electrical schematics that they can scan. I have to completely re-wire this truck and the Haynes manual pretty much sucks. Thanks in advance!