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I think chrome molding depends on the year of the truck and model, of course. There's a good description of trim levels on 73-87.com,a sister site to this one. Here's a link.http://www.73-87.com/7387info/7387trimlev.htm
81 up were mostly glued on except for the rear corner peices on the bed. They had a clip on them, so if it did, it would have holes in the rear corners of the bed. The trim aound the cab would have had clips as well, so look for evidence of any hole repairs.