Join Date: Dec 2005
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as TxFireman said, everything is pretty much unbolt then bolt on yours..unless you have different options, such as manual vs auto, 10-bolt vs 12 bolt, etc...everything else is the same
i'm in the process of rebuilding my 78 GMC K15 Sierra Classic using 86 C2500 parts, so pretty much anything from 77-87 will bolt in place of one another
the front clips started to change in 80, but I believe everything else will fit...if it doesn't..pull out the saw and welder...