[patrickt]

There is a good bit of confusion in the literature regarding the cams that were available, and that came installed, in the different 427 engines. I have a lot of the original literature from Ford, and even some of the original Ford documentation came with typos. Plus, over the years, errors have been copied over and over and over again - especially on the 'net. On top of that, Ford engineering and Ford parts numbers have caused confusion because people mixed them up and sometimes they sounded the same or looked the same. But really, unless you're a nut on the subject, nobody gives a shi* anymore on exactly what cam came in, or didn't come in, an original 427-4v LR versus the 427-8v LR versus next year's MR.