Is this DANA?

Dana used to make the sure-grip unit for 8.75`s from the late 50`s up to 1969. Perhaps that`s what the fellow was referring to. (?) Since it`s a 742 carrier, which was phased out after `68, it`s likely a Dana Power Lock. Another tell-tale way to identify it is if it has a set of internal clutches in the unit then it probably is a Dana.