JST Posted April 18, 2007 Share Posted April 18, 2007 I work for an oil co. We have several really big Macks that we use for rig up trucks. We call one the RD and one the big dog. The big dogs bumper is about chest high. ( how cool is that) The RD is a 74 model I think. Can anybody tell me what RD stands for.Thanks Quote Link to comment Share on other sites More sharing options...
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