I've seen those references too. I'm not sure where they came from as the accounts by the men who participated, while contradictory about how the events unfolded, never mention a 351 Winchester. Admittedly, with the 351 being as popular as it was, having readily availble large capacity mags, and having a very good reputation for being able to punch through car bodies, it is curious there wasn't one there. Maybe someone in Louisiana has, unbeknownst to them, a bunch of the brass in a shoebox that their great uncle or grandfather picked at the scene and there will be some 351sl in the collection?
Or maybe the History Channel has it right - AKs and SKSs?
John