rear end

Does anyone know what rear end was in a 1985 Ramcharger? I stuck my head under it and it has a back cover on the housing so I know that it is not an 8-3/4. I have the opportunity to maybe get this rear end very cheap and was thinking that it would be an 8-3/4 but no luck. It is a 4x4 auto 318. Could it be an 8-1/4 or did they come with dana 60's? I was going to use it in the Dart that I am building for my wife.