swapping out ring and pinion 7 1/4

Um…Charlie, what you're saying, based on just a guess/assumption that one particular car probably might not have had a rear axle swap, is that all the evidence is wrong and Chrysler printed up detailed and completely inaccurate parts, service, and tech information year after year after year, for most of a decade. Nope, don't think so. The simplest explanation is most likely the correct one, and the simplest explanation is that your car had a later rear axle swapped in.